Deleted messages
How do I get back deleted messages
iPhone X, iOS 14
Question marked as
Per Apple on iPad/iPhone, no: Delete messages on iPhone - Apple Support
You can’t recover a deleted conversation.
Per Apple on Mac, no: Delete messages and conversations in Messages on Mac - Apple Support
Note: You can’t recover a deleted conversation.
If you are using iCloud Messages, no. (Settings > Apple ID > iCloud > Messages)
If you’re not using iCloud for Messages, and if you have a backup prior to the deletion, and if you are willing to revert your entire iPhone contents to that of your iPhone prior to the deletion by restoring that backup, maybe.