Hello T...
Don't know much about syncing bookmarks, because it's something I don't need to do...
Similar to you, I have a desktop computer, but most of the bookmarks are different, because I do different work on either machine... In any case, it's so simple to shift the address from one machine to the other to create a bookmark (if necessary) that I personally wouldn't go to the trouble of trying to sync all pages...
However, if you have any Chromebook queries, I'd be happy to see if I can help with some of those...
Regards...
Robbie....