Pretty much just the pictures you can already see in this thread. Nothing that would skirt the Instagram guidelines – some butt pics, underwear pics, and that's about it. I'm pretty sure many of the posts now behind the paywall were public before. He said in a Q&A that he has "OnlyFans FOMO" and has thought about it, but figures it wouldn't be a good career move. I'm not sure if he shows anything more on Patreon.
I think the more people who DM him encouraging him to do OnlyFans, the greater the chance he will do it. I think he's just waiting for that validation. He's gorgeous and I would love to see him on OF.