I don’t know about the sites policy on it. But my option personal is that it always looks a touch off. Something is always at a wrong angle. And the eyes are usually wonky.
But if you like it. Cool.
As for stories using a chatbot. I don’t know. In my constant fear I might steal accidently from another writer I don’t usually read others stories unless recommended by someone I know. That way my stories are my ideas.
HH1