Start with the right checks.
A single deleted document usually needs a targeted recovery check. The available options depend on ownership, retention and what happened to the file.
What to do next.
Confirm the exact file name, original location and approximate deletion time.
Sign into the intended OneDrive account through its official website.
Check its recycle bin and preview the matching item when possible.
Use the supported restore option for the correct item, checking the destination and any existing file.
Check the result.
Open the restored document and confirm its contents and location. Tell collaborators if a shared document was restored.
Stop and get help if…
The file was permanently deleted, belongs to another person or is outside available retention. Check any separately configured backup without promising recovery.