To extend from what Lily has already said, in general Psychic fangs isn't really the best option on Lycanroc-Dusk, with most people preferring Crunch to stop Lycanroc being walled by Doublade/Palossand, which are both very popular Pokemon in the current metaame. Offensive Weezing variants are already 2HKOd by LO/CB stone edge, (and defensive 2hkod by CB after rocks).Which is a better Choice Band user, Terrakion or Lycanrock-Dusk? Terra has higher attack and STAB on CC, but Lycan gets Tough Claws Accelerock, which is really nice, along with higher speed and Psychic Fangs to damage Weezing-G. I'm currently running Lycan with Accel/CC/SE/PF, and it's pretty great but would Terrakion do its job better?
I'd also comment on the fact that in general Lycanroc-Dusk is better off running Life Orb, making playing around it defensively a lot harder thanks to being able to switch moves, while CB variants can also get rather easily punished for locking into certain moves like Accelrock / Crunch. While CB isnt terrible on Lycanroc-Dusk, Life Orb tends to be more effective for these reasons.