Don't ask me. I have nothing to do with Codeberg and I'm not involved in the process itself, I'm just speculating. I would assume that if they're against hosting AI projects they won't try to hunt for them using AI screening and stick to a honour system + reporting instead but I know nothing about Codeberg's inner workings to say for certain.
There will probably be more info on that once the official announcement drops so I guess we'll see.