A Microsoft file hosting and synchronization service.
Hi
I understand why you’d want a simple way to clear that list. I couldn’t find an official release date for that option, so I don’t want to give you a timeframe that isn’t confirmed.
You can request a “Clear recently viewed files” option or vote for a similar suggestion through OneDrive’s Feedback Portal. Microsoft’s page below explains how to access it.
https://support.microsoft.com/en-us/onedrive/send-onedrive-feedback