I have confirmed that the files deleted from the document library are automatically restored.
The file has been moved by Power Automate from Document Library A to the "Approved Folders" in Document Library A. (See the yellow line.) At this time, the audit log records that the file was deleted from Document Library A in March. (See the red line.) However, in May, an access log for that file was recorded under the account name "app @ sharepoint". (See the green line.)
Why did this happen? Is there a way to prevent it?