This Game Jam ran in Feb 2025 and is completed. You can view all the contributions https://itch.io/jam/realis-moon-jam/entries
There might be new Jams in the future but for now this one is done... i don't think you can "follow" or "join" Jam pages on itch.io if the jjam period is over.
If you would like to add them to your own list, you can add entries to your own Collection using itch.io :) basically there should be a " + " icon on each page, and you can click on that to create your own collection.