when I look in iCloud with the MacBook iCloud files there’s nothing.
will try it tomorrow. what exactly do you mean by reinstalling everything??I think that user means you need to setup iCloud for the first time. See the Catalina section here. Or completely reinstall the OS. Their response is definitely vague and hard to discern what they actually mean.
IF the folders and files are on iCloud, you should be able to re-download them.
What errors did you see?