How do I get my text messages back?
Tap on the three-dot menu in the upper-right corner and open the Recycle bin. Check your deleted text messages. Long tap the message you want to retrieve. Select Restore at the bottom and check the same in your main inbox.
How do I find my backed up text messages on my iPhone?
Recover deleted texts using an iCloud backup
Open Settings, tap on your Apple ID card at the top, select iCloud > Manage Storage > Backups. You'll see a list of backups for your devices and can tap on the one for your iPhone to see when it was last backed up.