I didn’t repeat the above test, but I did do a backup and it worked fine. I also found this page:
Revoke access to OneDrive where the URL for my personal account showed me what I had.
https://account.live.com/consent/Manage
You could look at whatever applies to your situation and see if Microsoft still knows Duplicati.
Interestingly I have two entries with different logo styles . The one used in 2019 might be old.
OAUTH Problem with Onedrive might be your past report, but it was posted just 53 days ago.
I’m pretty sure my OneDrive was idle for longer than that. I had switched over to Backblaze…