BDSP pokemon have a different mark than SWSH does, ergo no matter what moves pokemon learn here, it won't matter in SWSH because you'll need to do a mark reset which will wipe out the incompatible movesI feel like version exclusives are a bit of a slap to the face in a game that is (probably permanently) missing nearly half of the existing pokemon...
Sylveon is exclusive to the games that weren't delegated to a company that has never made a video game before... Don't hold back shieldon on top of everthing else we're not getting.
The moveset leaks are something that might be interesting for SwSh VGC though. Obviously no move tutors means fewer returning moves. But when these games become cross compatible and if pokemon can get into BDSP from SwSh, it might mean more mons with explosion, swagger etc. in VGC.
e: Oh you meant the reverse, bringing BDSP pokemon into an area where they can learn the new moves with it just being important to have the mon, gotcha, nevermind