I heard that they updated the models in Scarlet/Violet. At first I would not believe it since this is GameFreak we are talking about and the mess Sword/Shield was, but there were updated models in Arceus. And I can see that the models for some of the older Pokemon do seem to have additional details like eyes or mouths that are actually part of the model instead of just the texture.

But then I was checking out videos of Scarlet where people hacked in Pokemon that are on the rom but not obtainable yet without events or Home, and they looked more or less like the 3DS models.

Did they update the models or not?