Chosen Solution

Today I noticed a small bubble in the rear camera, the top one.

Hi Usually there is a small bubble like object In the middle of the camera but this one clearly isn’t meant to be there It could be debris behind the camera lens that can be removed by disassembling the device down to the camera and cleaning it with isopropyl alcohol and a cotton bud Here’s the guide for that iPhone 13 Pro Rear-Facing Camera Replacement You could also take it to the Apple Store and see what they can do for you if it’s under warranty Hopefully this helps Any questions please ask Thanks:-)