How do friends who have deleted each other recover their chat records?

The method for restoring mutually deleted friend chat records is as follows:

Open the Apple phone settings, click the ID avatar, click icloud, and click Manage Storage Space to see if there is any backup. If so, you can find an idle Apple phone to re-login the ID, download the data, and then migrate to the current phone.

Note: Be sure to find an unused iPad or iPhone to use, so as to avoid the situation that the previously lost chat records are not found and the existing chat records are lost.