The "Documents" folder was reset after the iCloud plan upgrade

After upgrading my iCloud plan from 200GB to 2TB storage, the “Documents” folder on my Mac was unexpectedly reset, and I lost all the files inside. I couldn’t find them using the Mac Search panel, the Bin, or in the “Recently Deleted” files on the iCloud website. This included all my information from my Adobe application, including saves, backups, and projects. The “iCloud Documents” folder was simply recreated and even a few pinned files disappeared as well.

I’m worried that I’ve lost everything. Is there any chance to restore the files? (I wasn’t using Time Machine and don’t have any other backups.)