Sure is a shame this happened during the administration that's on track to normalize pedophilia. Along with damn near every other conceivable crime against humanity.
But for real, though, I'm not sure what you'd charge him with. Simulated child porn isn't illegal in the US, at least not on a national level; I dunno what state(s) have jurisdiction over xAI or what their laws are. So the question, then, would be whether AI generated content is covered by the same first amendment protections, or indeed any at all. And if the courts rule no, then suddenly any site hosting AI generated pornography of any kind is going to be in trouble, because they can then be charged under centuries-old obscenity laws that were "overturned" on first amendment grounds but never repealed and suddenly relevant again.