The post sent by people behind this platform said that not all NSFW games are disappearing theyre just being deindexed (hidden) until they have been checked for complaience with new rules made by the companies that handle transactions on this site the games will only be removed when they dont abide these rules otherwise im guessing they will be indexed back (also you can just search for a specific game on the browser with addition of itch.io and the game page should show up) i dont know about steam tho