But still, can't figure out why and when my Win 10 install has my MS Account listed twice, as that is the cause of the issues, can't click on the Verify link under Sync, and it's also probably why Win 11 Widgets won't work since it can't log into the online account.
Probably because you are using the same computer name and MS Email account and going back and forth from Windows 10 to Windows 11, also you don't have an account verification separate email set up.
Widgets needs to login to your MS Account to work, if it fails it may close down right after you try to open it.
The clean Install is just to isolate better where the bug is. You can always go back to a previous Image backup or clone once you have done with the test.