Pokémon Model Ripping Project

[Random Talking Bush]

I've downloaded and extracted all 3 Sword/Shield Pokemon models archives, however none of them has Decidueye folder (I assume it should be called pm0724_00). Is it called differently?

Yeah, it's got a different name. All Pokémon models from 6th Generation onward use a different set of internal IDs instead of their regular Pokédex number, and Decidueye's internal ID is actually 843 (I have a full list of them all in the first post), so you'd be looking for "pm0843" for that instead.