Incomplete sync

I just purchased a new MacBook Pro computer, running iOS 15.3.1. I migrated most of my files from my prior computer, using Migration Assistant. Created a new folder in Dropbox on my iPad, and the contents appeared on Dropbox.com, but will not show up on my laptop. I tried pausing syncing, then restarting, rebooting my computer, then finally uninstalling the Desktop Dropbox application and reinstalling it with the most current version. It seems that one thing the may have been limiting Dropbox was that I was using Dropbox Basic, and somewhere along the way that was limited to only 3 devices, and I have Dropbox linked to 5 devices. So I also upgraded to Dropbox Plus, which allows multiple devices to sync. My computer went through the whole sync process, and says everything is up to date, but only about 75-80% of my folders and 75-80% of the files in those folders are syncing, and it seems very random. Some folders do not even appear on my MacBook Pro, so I cannot right click to make the folder contents appear off line. And at least one folder, which should have 115 small files in it, is empty on my laptop. Syncing still works fine on my older computer. I have looked at online help, etc, and not found anything to fix this problem. Can anyone help?