Is anyone else having issues with Apple Keynote iCloud collaboration not working (MacOS)?

Hello.

I share keynotes a group of people and this has been going on since a recent set of updates to iCloud several weeks ago. I've been using Keynote collaboration for years—this only started recently (Since "Latest Activity" functionality was added).

We've all done the following:

• Fully updated MacOS + iWork
• Completely removed iCloud, restarted the computer, and signed back into iCloud (repeatedly)

The issue persists. It looks like "Sync Status" is hanging for some reason. It can be left for hours and never move beyond waiting to sync. Also this is all on high-speed internet connections above 150+ MBs.

• All computers involved are laptops running M1 and M1 Pro chips.
• 1/2 running up-to-date version of of keynote on MacOS 12 with the others on 13

I love Keynote but if I cannot get this working, I'll be forced to move my team over to Office365 (which I would hate).