Oh well, let me help you!
Itch.io, along with Steam, is experiencing some issues related to payment methods due to some... situations in the last few months.
I won't go into too much detail, but if you do a little research, you'll find out what it is.
The thing is, Itch.io isn't indexing games that have the "Name your price" option enabled. If you remove this option and make the game free, I'm sure it will be indexed within a few minutes. This happened to me too, and no one gave me any support. Fortunately, I found out through a user here in the community. But yeah, try this, I hope it helps!