Is it on iCloud.com? Very weird. Mines a mess but I’ve been lucky to not have data loss at least.
Well...
For example. I did a little digging to try and find the most recent versions of my files.
There are tons of "recovered" and multiple document folders etc. And I can't figure out what is what.
On a Mojave machine I had a shortcut in my dock to most of my known current Numbers/Pages docs, which I have been using (because they synced so well before between all the devices... ugh). They were still there, and editable/viewable. This gave me a huge sense of relief, as I thought I lost them.
However I could not actually use the finder to see them. They're hidden somehow, where Numbers & Pages could see them, but the Finder can't. I managed to copy them to a new folder off the root of my icloud drive called something like "CURRENT FILES". Mojave iMac Pro can see them. iOS 13.1 can see them (and edit them, and they sync on both an XS Max and 2018 iPad). Which is good to know considering how messed up 13.1 beta 1 is.
And iCloud.com can see them and open them. Beta Icloud.com can also see and work on them.
ONLY Catalina latest beta (on a quad core 13" MBP) can't. So it's really screwed up, Catalina.
They're going to launch this in a month? Oh boy. lol
"One more thing.... you're going to lose your stuff"