Hi there and welcome
The synchronizations occur when you sign into Google and will synch with the bookmarks on your account.
Do you still have access to the computer with the latest bookmarks on it?
Yes, I do, Richard
ok, go to that computer, open Chrome and click on the three dots, then settings.
Do you see the account it shows you signed in as?
It wasn't signed in, but now it is.
ok, this is why you did not get them, so sign in, it will update the bookmarks and on all other comptuers signed in, they should get them now.
Try to restart if you do not see them at first.
OK, but which is considered the 'master' computer?
None, it should merge them altogether and can at times result in duplicates which you need to clean up (that you cannot avoid)