My FNF mod appears to be shadowbanned. I think it might have something to do with the source material the mod is based on.
Viewing post in List of shadowbanned NSFW games
Your game shows up for me searching https://itch.io/games/tag-2d/tag-no-ai/tag-rhythm its a fair bit down, but it is there.
Not saying it wasn't/isn't shadowbanned, but I do wonder if the web clients are showing different things to different people, Like maybe some folks are seeing more/less games or even different games that are or are not shadow banned for others.