A lot of these are similar to MAMP's discord thing which I think she will post soon.
S Rank
S

Eternatus

Zacian-Crowned
These two mons still define the meta. Both are incredibly fast, with Zacian-C being nearly impossible to pressure offensively while usually relying on at least two mons per team to defensively check it (along with another soft check like Poison Heal something). Etern is still an amazing blanket check to the meta that is difficult to actually pressure because like people have said before, most things that check it such as Zamazenta-C can't actually pressure it while most things that pressure it are slower and weak to Etern. In fact M2 and certain DGZs are the only mons that are not slower than Etern and can OHKO it (there are basically 0 viable scarfers that OHKO it). You can call this mon overprepped and dropping in usage but its dominating presence cannot be ignored and even whatever people are bringing for it aren't super solid counters either. Offensive Etern is definitely falling off though.
S-
Reshiram (From A)
Zekrom (From A+)
These two Dragons define the Balance meta right now. Poison Heal Reshiram and Zekrom are so versatile and threatening that they are able to put in work almost all the time in any matchup just by not getting worn down, gaining momentum, spreading status and Koff, and setting hazards. Reshiram is the weaker of the two but its burn spreading Lava Plume as well as its incredible defensive presence (Fur Coat Reshiram is the best Zacian-C counter if one needs to role compress) makes it super splashable (see second highest usage in OMPL). Zekrom is one of the most threatening and unpredictable mons right now, with Poison Heal sets being able to provide long term pressure while its offensive sets being very flexible with moves, abilities, and items (you only need Bolt Beak and a Dragon STAB). They basically have influenced metagame developments, such as Primarina, PSea Zacian, and Ferrothorn that are warped around reliably checking and pressuring them. I believe the creation of S- is necessary as Zekrom is clear cut above everything else while Reshiram is imo better than the two mons in A+, but I can take Reshiram in A+ as well.
A Rank
A+

Darmanitan-Galar-Zen

Zamazenta-Crowned
Not much have changed for these mons. DGZ is still one of the most threatening wallbreakers in the meta. Zamazenta-C is incredibly splashable (to the point where pdt has used the term "Zama-C slot") as a defensive blanket check depending on ability.
A
Kyurem-White (From A-)
Great rising wallbreaker that takes advantage of Etern, Resh, and Zek which are massive threats in the meta. Actually difficult to counter without Ice Scales which it can still break with stuff like broken Trick or just chip damage.

Wobbuffet
Always criticized but Imposter honestly isn't that bad as it can soft check every single breaker while scouting is actually a godsend in this meta where a lot of teams are dependent on several checks to mons depending on coverage (notably for Zacian-C and DGZ).

Zamazenta
Still a solid mon but faces competition from the other PHs. Cotton Guard is a strong late game wincon however as it can PP stall several Etern sets.
A-
Golisopod (From B+)
Super splashable mon because of how much it provides, slow pivoting that is threatening is great, hazards is great, Ground-resist is incredible, other resists are valuable, and it's actually very difficult to pressure this because it has a Shield move 99% of the time and the weaknesses are practically nonexistent in the meta outside of Bolt Beak, which it can usually just scout with Shield or U-turn on the Zekrom.
Melmetal (From A+)
It's just not as splashable as Zamazenta-C and the Fairy/Flying neutrality really means nothing in this meta right now. The special bulk drop and too low of a speed is just not as good.

Mewtwo
Sheer Force is still a strong breaker but losing Smash kinda hurts because it needed +2 Focus Miss to OHKO Scales mons. Poison Heal on the other hand is incredible as it can reliably threaten Etern while there aren't really great long term switch-ins because Wisp is a broken move. Psysurge unban could lead to some interesting sets too.
B Rank
B+
Lunala (From A-)
Suffering a lot when a ton of teams are carrying Snorlax/Umbreon/RegenVester etc. It just doesn't hit very hard and cannot punish its checks at all unless Trick. That being said while Specs sets are bad it does have great bulk to run some utility sets that can offensive pressure Etern. Garbage spinblocker though. RIP the amazing Smash Geist Photon CC set though that was actually good.
Seismitoad (From B)
Actually incredible mon because it blanket checks half the meta. A couple of options too ranging from classic FC to Bounce to PH. Ground STAB is really good and Scald is annoying to deal with as well. A sole weakness means a lot of physical attackers actually have to resort to running Grass coverage which hardly covers anything else outside of a Def drop.
Snorlax (From B-)
Poison Heal Lax is incredibly versatile with blanket checking special mons and acting as a strong pivot. Regular defensive sets are still good too with Facade being really strong and hard to punish. Appreciates Melmetal declining.
B

Barraskewda
Fish is still alright ig. Hard to check if you don't have Etern or big FC resist.
Darmanitan-Zen (From B-)
Really rising in usage because its typing is so incredible. Ton of useful resists to check Zacian-C Reshiram Mewtwo while its strong SpA and Psychic typing makes it an excellent defensive switch in to Etern. Psychic also does a ton to would be Lava Plume absorbers like Seismitoad and Golisopod. Atrocious atk makes it a great Sap absorber too.
Dragapult (From B-)
Not sure on this but its amazing speed and offensive typing leaves a lot of room for innovation with this mon. Adaptability is likely the only set but there aren't a lot of defensive switch-ins. Only problem is actually forcing switches as 120 100 is weak af.

Kyurem-Black
Kyurem-B is still Kyurem-B, basically worse Kyurem-W but has strong priority which is helpful for cleaning up Etern and some possibilities of innovation beyond that.
Zeraora (From B+)
It is basically outclassed by Zekrom. Outspeeding Zamazenta is nice and all but when everything is prepping for Zekrom this isn't breaking teams at all.
B-

Excadrill
Matches DGZ level of wallbreaking potential (probably even better) but garbage speed tier prevents it from being higher since it requires extensive team support. If it's Scarf it has no breaking power.

Gyarados
Decent mon overall. PH is pretty solid as it can soft check Zacian-C and Reshiram and Ground immunity is never bad.
Marshadow (From C)
Poison Heal has cemented itself to be solid from SL42's games as a great spinblocker and long term pressure source.
Necrozma Dawn Wings (From C)
You might as well go NDW for Specs sets compared to Lunala as its extra power really makes it actually threatening to offensive mons like the Dragons and Zacian-C.
Necrozma Dusk Mane
Primarina (From D)
Very solid Reshiram check and with Volt Absorb Zekrom check and with Ice Scales Kyurem check. Not passive either as dual STABs have great individual neutral coverage and utility with burns and SpA drops. Poison Heal is actually threatening if you give it setup (which you should otherwise Resh isn't pressured and Spectral is so bad).
Solgaleo
Both are similar so they should be in the same rank as Solg has a far better speed tier but NDM's extra power lets it do some nice stuff with Scarf. STAB Physical Photon is great to beat a ton of physical walls like Etern and Toad while Steels are pretty easy to abuse with two coverage moves or something (I mean it is really only Melm since Zamazenta-C takes chunks from Photon).

Zacian
Pretty much one-trick with PSea but it is the most versatile Fairy so you can slap some other abilities to play around with. Checks Resh checks Zama checks other stuff with Immunity abilities.
C Rank
Aegislash (From B-)
Garbage mon 0 bulk can't spinblock.
Ferrothorn (From C)
Bulk is really unfortunate since it cannot run both FC and FF at the same time.
Incineroar
Umbreon with burn immunity, also soft checks Zacian-C with nice Fire typing.
Keldeo (From D)
Better than the D rank and the PH set, while I never used it, doesn't sound bad with Fighting STAB to deter the common SpD mons in Lax and Darks while Scald is broken.
Lapras (From D)
Kinda similar to Darm-Z but worse typing. Scald is really good and Freeze-Dry is literal freeze machine. Checks Kyurems easily as well as Etern sets. Situation GMax Veil for some niche moments too. Biggest weakness is cannot run Ice Scales and Volt Absorb at the same time as well as having no room for utility moves but you can probably just spam Freeze-Dry for utility lol.

Steelix
Actually good because hard Zekrom check and STAB Earthquake but it can be taken advantage depending on ability. Bounce gets bopped by V-create, everything else lets Spikes go up, FF gets bopped by Mold Breaker stuff, PrimSea gets bopped by Wisp, all are weak to Earthquake too.

Umbreon
Much more passive than Lax but gets the job done as a special wall and Psychic immunity is useful for Psystrikes.
D Rank

Corviknight
Ground immunity and Flying-STAB with a Defog effect makes this mon useable.

Doublade
Nice bulk, maybe this is actually better than Aegislash.

Gastrodon (From UR).
Almost worse Toad but it's stronger Special bulk lets it check Reshiram + Zekrom together better (Relaxed Slug better than Sassy Toad), stronger attacks too.
:gourgeist-super:Gourgeist-Super (From UR)
Pretty solid spinblocker that has the coveted Grass-typing.

Hippowdon
Better phys bulk than Toad and no 4x weaknesses to play around.

Jellicent
Decent ghost and Water-type, not bad spinblocker.

Mandibuzz
Worse Umbreon but Fighting neutrality makes it a much better M2 check.

Milotic (From UR)

Pikachu
Idt anyone has actually made a decent Chu team but with fragile improofing maybe something like Tailwind could work.
Rhydon (From C)
Hardly any reason to use this over say Toad because Burns actually affect it.
Runerigus
I would say UR but compressing a Ground and a Zama check is alright.
Toxapex (From B-)
I have never seen this mon ever. You need all the abilities in the meta to make it work. Can't check Resh well bait for Zek can't check Etern well can't check Kyu-W well hardly checks Zac-C at all. Best it can do is check like Zacian and Zamazenta and Steels but honestly just use Etern or Golis.
Type: Null (From C)
When you can't run Poison Heal or have strong offensive presence Lax.
Tyranitar (From C)
I have never seen this mon ever. I don't even know what the sets for this are. Can go UR fwiw.

Vaporeon (From UR)
Two bulky waters that actually resist Fire. Milotic is faster but Vaporeon has slightly better bulk I think.
UR
Bisharp
What does he do.
Centiskorch
Haha Ground-neutrality.
Chandelure
Reshiram, Lunala, NDW.
Dusclops
Most passive mon like ever?
Escavalier
Haha Ground-neutrality.
Torkoal
Reshiram