Deleted text messages

The only way to recover deleted text messages is to restore your iPhone to a backup that you would have made of the iPhone while the messages were still on the device. Restoring a backup takes the iPhone back to that place in time. It also erases everything that has been done since that time on the iPhone. If you do not have a backup of the device when the messages were on the iPhone, then there is no way to recover them.

If you just deleted them and you are not using iCloud Messages, you can restore the iPad to the latest backup you have as long as it was made when the messages were on the device.