How do you retrieve deleted messages on iOS 15?

4Boots wrote:

Thanks but how do get to the backup? I’ve been trying to get into the cloud.

Well, if you have a recent backup (on iCloud or on a computer), these are the instructions to restore data from it:--> Restore your iPhone, iPad, or iPod touch from a backup , bearing in mind that this process overwrites all existing data on your iPhone.

From a backup created before deleting those messages.

No backup = No recovery, sorry.

Regards

Giulio

Not possible unless you have a separate backup of the messages on another device that were saved before you deleted the messages.