Your account is two weeks old.
Indexing can take several weeks. And you have payment active. That takes extra time.
The other account is four weeks old. Also payment active.
It takes time, people. Itch is free. It is holiday season. I would imagine that some staff is on vacation and the people that do work have lots to do.
So the answer to this and all the other questions (why is my game not indexed) is usually: Because it is in a queue and the queue waiting time can be weeks.
Oh, and the game from this topic was indexed in the meantime.