I recommend you to use iPhone SMS Recovery
. It can scan your iPhone 7 deeply to find the deleted and lost text messages for you. After previewing, you can easily recover any of them from your iPhone 7. Besides SMS, you can also recover photos, videos, contacts, call history, notes, reminders, calendars, voice memos, voicemail, safari bookmarks, Whatsapp messages and other deleted data from your iPhone 7 and iPhone 7 Plus to computer.