Hello, I'm really scratching my head on this one! My game (https://1-rob-41690.itch.io/clivenwrench) has both "3D Platformer" and "collectathon" in the tagline and tags sections respectively, but running either of these searches appears to omit the game entirely. The game itself is searchable using "Clive Wrench", so I know it's definitely set to public, and in fact it's even appeared in the top handful of games in certain categories over the last week or so!

Is there a reason this is happening, something I've done/not done perhaps?

I just tried, your game comes up first under "collectathon" and near the bottom of the first page of results for "3D platformer". Maybe it took a while to be indexed?

Ah I see, that makes sense. But in which case it only makes this more perplexing, given my short description is literally "3D Platformer/Collectathon"!