The guidelines say
Don’t Post AI
AI is a useful tool, but Meta is first and foremost a place for human communication. When asking and answering questions, or posting any kind of reply, don’t simply copy in AI generated content. We have bots for that.
So I think usually you wouldn’t do that - even with attribution.
But those guidelines also say “Don’t sign your posts” and I haven’t seen those being removed in the past 2 years.