I just wanted to add my project and it didn`t appear in the list. I uploaded it to itch.io, but the page of the jam said that there is no such project? Can i upload it somehow, on the itcho.io can be seen that i finished it when jam submissions where open. Becaus eit is really disappointing.

Is your game set to “Published” (instead of Draft or Private)? I think that’s necessary for it to show up, though I’m not sure.