iCloud Drive won't sync or not showing files
I stumbled into this issue after installing macOS Catalina from usb drive as clean install, then synching with my iCloud account.
Apparently Photos do not suffer this problem so it isn't a real network issue but more like a protocol communication issue.
After leaving my MacBook Pro all night lit in attempt to synchronize my iCloud Drive, this is how folder (~/Library/Mobile Documents) appear from terminal:
but this is how it appear from Finder
I spent 1 hour with Apple Support and they remotely guided me into several attempt to disconnect and reconnect iCloud account in order to make it sync, but nothing really worked.
If u incurred on same issue leave a post here in order to alert community about the severity of this issue.
/GM