How to retrieve messages that’s been deleted?
How to bring back messages that have been deleted?
iPhone 6s Plus, iOS 13
Question marked as
If you had messages in iCloud turned on Keep all your messages in iCloud - Apple Support and those messages were deleted, then they are permanently gone. If that feature wasn't turned on, you can restore from a backup -- Restore your iPhone, iPad, or iPod touch from a backup - Apple Support.