How to retrieve deleted message

Here are the instructions:

Recover deleted messages on iPhone - Apple SupportAppleOfficial Apple Support › guide › iphone › ios

Note that......

• You must have iOS 16 installed on your iPhone
• The message must have been deleted....after....you installed iOS 16
• The message must not have been deleted more than 30 days ago

If all 3 conditions are not met, the message will not appear in Show Recently Deleted, so it cannot be recovered.

Aljon08 Said:

“How to retrieve deleted message: I want to retrieve delete message”

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Recovering Deleted Messages:

What to Consider:

A. Restore from Today's Backup:

Restore your iPhone from a backup of it that contains these messages, and you could recover them.

B. Check Messages App:

If messages was enabled on your iPhone along with your Apple computer, then check and see if the Messages app is enabled on your Mac to see if it exists in it. You'd start up your Mac, not connecting to the Internet, and open the Massages app. Then proceed from there with retrieving it. Important: Be certain you do not connect to the Internet while booting up, as syncing would delete it. So, power off your router to avoid the connection.

C.  Check your Carrier’s Site:

Log in to your Carrier’s site, seeing if you can view a history there. Doing so, I can see a call log going back 90 days —but not a text messages log.

See this.

Recover deleted messages on iPhone - Apple Support