As you may already know, since May 2021 you have a health report available from OneDrive Sync on the Apps administration portal (see https://t.co/kZ9YCpaThW).
Well, while this new health report is providing quite useful information to monitor your OneDrive clients health – especially the Known Folders redirection, the report has been updated to now include more details on issues detected.
You can get the new tab by accessing the Health\OneDrive Sync tab from the Apps administration portal (https://config.office.com/)
If any issue is detected you will get the issue details as well as how many devices are impacted with this specific issue