: Many users archive conversations instead of deleting them. In Messenger, tap your Profile Picture > Archived Chats to see if the messages are hidden there.
If you have email notifications enabled for Facebook messages, you might find partial recoveries. Search your email inbox (Gmail, Yahoo, Outlook) for noreply@facebookmail.com with keywords like "message" or the friend’s name. While you won’t get the full conversation thread, you can often retrieve the text of older messages this way.
