iCloud Drive is not syncing with my MacBook Air

Hello all,

I have a 2TB storage with iCloud and several files stored there. I update my files on a permanent basis and I am able to access and edit files in my iMac running Catalina (last accepted MacOS) and my iPhone 12 Pro with IOS 14.7.1.

I have a MacBook Air running Big Sur, which I don't use on a daily basis. I had to use it today and for my surprise, when I opened Finder and went to iCloud Drive I noted files were not updated. Shouldn't it sync automatically ?

My MacBook Air is listed as one of the devices connected to iCloud

Any help will be welcome

Thanks Paulo