I have heard all sorts of complaints about losing access to games that may or may not be NSFW (and most definitely removed from the platform). But I have not seen people backing up their complaints with proof. The only proof I found was in a conversation on X/Twitter where the user showed screenshots of download files still accessible from games that were removed from itch due to the ban. https://x.com/letsmaybeLP92/status/1948544883410829370 I can also show another example of a game that is no longer accessible due to dev removing files from the game page. Please let me know if you have encountered such a page for the removed NSFW games. 

Also check https://itch.io/docs/buying/already-bought if you are worried (but keep in mind it only shows games you actually paid money for)

I wanted to check this too and found that luckily I still have access to all the adult comics/books that I've previously bought. Hopefully will be the same for others.

If you know the link to the page you can access it as far as I can tell. Also anything saved to your collections can be accessed. And, so far, it doesn't seem like most content has been removed yet, just delisted. God willing this mess will be over with soon.

I see that no one has came forward to say that content they owned is gone, just that they can't find it if they forgot the name.

https://itch.io/docs/buying/already-bought could help (which I found)