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Steam is already banning some games, there are also different moderators deciding which games are allowed to even be in the store, but their opinions are divided. If your game contains anime lolis, you need to be lucky to get the manager who actually likes this. There is one specific unknown employee who is straight up rejecting all anime games all the time, and will even blacklist you.
Game Jolt banned a while ago nudity and graphic horror, Itch made a public statement that every indie developer can upload their 18+ games there, but Itch is already a tranny haven thougevertheless
If your game is directed to Transtakus or weebs, then maybe dlsite, will work perchance.