Why is OneDrive showing missing or deleted files that were moved to a different folder?

Check connected device settings:
Make sure the settings on all devices connected to OneDrive are correct.
Check file search settings:
Verify that the files are not excluded from the search results due to incorrect settings.
Check if things are running smoothly in the background:
Inspect any information services, cloud service applications, and synchronization services to ensure they are running as expected.
Repopulate the OneDrive:
Reset the view settings on the OneDrive to repopulate its contents.
Check for errors:
Scan for any errors that might have resulted in files not being shown.