If you can't find a file on your computer or you accidentally deleted a file, you can check your local Recycle Bin. Alternatively (or if the file was on a network drive) you may be able to recover the document by checking for a previous version.
Deleted online-only (the cloud icon above) files will not appear in your computer's Recycle Bin or Trash. See this article: How do I Recover Deleted Files? (OneDrive)
Note: If the Restore button is unavailable, you can't restore a previous version of the file or folder to its original location. You might be able to open it or save it to a different location.
Warning: The file or folder replaces the current version on your computer, and the replacement can't be undone.