Periodically go to important chats, take screenshots, or copy-paste text into a secure note-taking app.
To get the data back, you must factory reset your iPhone (Settings > General > Transfer or Reset iPhone > Erase All Content and Settings). how to recover deleted messages from botim
Ensure the last backup happened before you deleted the messages. Periodically go to important chats, take screenshots, or
See if there is a recent backup for your device that includes app data. Periodically go to important chats