I created a gamejam that will start on December 13th, but it's not on the list of jams. Could someone please put in on the game jam page so that it will show up? Thank you.

--> https://itch.io/jam/posolstvo-winter-game-jam-2025

...Please read the rules of this category where it says that:

1. the people you're addressing don't monitor the forum and are unlikely to see your post
2. what to do instead

Additionally, please see the last question in the unofficial FAQ, that explains your problem.