Hello,
I made a mob (deatheater) and in my resourcepack it's a blackmith villager
but how can i change the profession? I tried different things like
''villager_type: blacksmith''
''prof: blacksmith''
''profession:blacksmith''
but nothing worked

thank you

is this also possible as disguise?

I'm not sure, honestly- whatever you put in "disguise" gets passed to LibsDisguise, so if there's a way to do it with a command then you should be able to do it with configs too.

Sorry for the late response and that this isn't better documented!

"villager_profession: blacksmith" should work.