So I will have to give up on this idea.
I mean, you can look into it yourself, but I just remember this is what I was told by a developer ages ago. Things might have changed. But yea, it's probably hasn't and you probably can't do it.
This policy this likely partly why any games you see on here that have bestiality it's between NPC and animals. Particularly never between the player character and an animal, especially not if the MC is a guy.
I do know there was one game where a male MC fucked a female centaur, but I can't remember if they had a Patreon or not, but regardless all the art in that game were drawn, not 3D models etc