Check the Messages app’s Recently Deleted folder
Restore from an iCloud backup made before the texts were deleted
Restore from a computer backup made in Finder or iTunes before deletion
Use the same Apple ID on all devices and check synced Messages on iPad or Mac
Ask your carrier if they can provide message records
Use a trusted third-party iPhone data recovery tool
Contact the sender or recipient and ask them to resend the texts
Stop using the iPhone if you want to maximize recovery chances
Back up the iPhone before attempting any restore process