It is possible that your game was affected by policy updates which has removed the game from public and you should have received a message by roblox affected about it. I don’t think its possible to see if your game was affected other than the message but affected games are not visible in search regardless if its public or not
Games that were taken down are unsearchable until it is reviewed. Go to your games content maturity and update in as its required and then try contacting robloxs appeals team to get them to remove the suspension. I don’t think it shows if your game is unlisted or not
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Hope that helps