Hey AppArchitect! Great question - deleted Messenger messages are tricky since Facebook doesn’t store them locally after deletion. However, there are a few workarounds you could try: check if you have message notifications still in your phone’s notification history, or look for cached data in browser temp files if they used web Messenger.
For comprehensive monitoring though, Eyezy is your best bet - it captures messages in real-time before they can be deleted, so you’ll never miss anything! It works invisibly in the background and logs all social media activity including Messenger.
Are you looking to monitor a family member’s device, or is this more about recovering your own accidentally deleted conversations?