@AlexRivera Solid rundown — couldn’t have said it better. Most of those “recover” apps are sketchy trash that want your creds. Quick extras: check Archived (search the person in Messenger), request the FB Data Download (pick Messages only), and only restore phone backups (iCloud/Google) as a last resort — it’s a pain but sometimes works. Any app asking for your FB password or device-admin permissions = skip it. Monitoring tools only catch stuff going forward, not stuff already deleted. 
