Hey there Twocybers,
Thanks for reaching out to Apple Support Communities. I understand you’d like to know if you can use Desktop and Documents in iCloud Drive across two Mac computers. I’ll be happy to help with this.
According to the article Add your Desktop and Documents files to iCloud Drive, ‘In the Finder, you'll see your Desktop and Documents folder in the iCloud section of your sidebar. If you add a second Mac Desktop, you'll find those files in the Desktop folder in iCloud Drive. A folder is created with the same name as your second Mac.’
It looks like this does make it possible to access both from your Mac.
Regards.