Yes, as explained in lots and lots of topics, jams don't automatically appear in the calendar. They must first be seen by staff, and approved. Not all of them are approved. Please wait.
Viewing post in Game jam not showing up
I don't know, it depends. But even if it's not in the calendar, once you publish the jam page it should be live and fully functional. That doesn't look right. You should probably double-check your settings and contact support if all else fails.
How long does it take to get seen by an admin, my jam starts in 10 days https://itch.io/jam/hokocafe-game-jam