In Windows 11, the Documents you see by default is actually just a shortcut to OneDrive bloat ware.
You need to fiddle with that thing online using your Microsoft account, while being careful not to delete anything there. If it’s gone from your OneDrive, it’s gone from your PC as well. More Microsoft fuckery is likely needed if that happens, with little chance for success.
Plenty users lost their shit to OneDrive crap, myself included.