A Microsoft file hosting and synchronization service.
If the files have been deleted and are not available in the online OneDrive Recycle Bin (https://onedrive.live.com/), if you have a Microsoft 365 subscription, at the top right of OneDrive in a web browser, click the gear icon and select Settings.
On the left click 'Restore My OneDrive', and check if that function can restore your OneDrive files.
If that process is not successful, the only hope you may have is to use some 3rd party recovery utility to try to undelete and recover the file on your PC.