I noticed the following issues after installing iPadOS 14 on my iPad Pro 12.9-inch 2nd generation 2017, but I cannot say they are related.
Pixel brushes were not syncing or syncing so slowly I decided to reinstall Fresco. Full drill, delete the app, reboot iPad, reinstall. Brushes went back to usual behavior: upon first access, grey rectangles on a brush set are slowly replaced by stroke preview + name, about one brush per second.
But now my Fresco Adobe Creative Cloud documents won't show. Created a document, upon closing it, one cloud document showed up. Opened the Creative Cloud app, documents were all there. Changed some to 'available off-line', nothing changed. Rebooted iPad, no change. Reinstalled it again, not even the previously shown document appears. Sign out and back in, no change.
Created a new doc, put in some strokes, it shows on Creative Cloud just fine. Another reinstall, no document, not even the newly created one.
Scratch all that, just found them. The cloud files, I mean.
I guess I was fooled by that one file appearing on the Home when I first re-installed. I just assumed all files would show up on the same spot. No they are under YOUR WORK / Cloud Documents. And probably were there all along...