I have 10 games and "I Crazy Cube!"  and "Grapply!" are indexed but "Pho runner!" was indexed for 2 years but it got randomly unindexed and my other games are not indexed and these games are "Pho runner!", "Kill The Face!",  "Platformer 3d", "Flying Simulator", "Infinite dogder", "PickaxeCraft",  "Cup Filler", "Glow Destroyer"

Platformer 3D doesn't meet the minimum requirements for indexing. For the others, I'll speed things up. Edit: in fact a lot of the others look like they shouldn't be eligible. In the future, try to make your game pages complete before publishing.

Please make sure you read the getting indexed guide here: https://itch.io/docs/creators/getting-indexed

There are basic requirements on filling out your page you must complete to be eligible for indexing.