Hello C0R3Y_Y,
Ensuring the rear facing camera is working as expected is important and you've walked through fantastic troubleshooting steps to help work towards a resolution. In addition to the steps you've already completed, you'll want to complete the steps listed below. These steps can also be found in the following article. While the title of the article references the camera not working at all, the steps are relevant.
- "Remove any case, accessory, or film that might block the camera or flash or that places a magnet near the camera.
- Test the camera by trying to take a photo.
- Test the LED flash:
- Try the flashlight in Control Center on your iPhone or Control Center on your iPad. On an iPhone X or later or an iPad, swipe down from the upper-right corner of the screen. On an iPhone 8 or earlier, swipe up from the bottom edge of any screen.
- Tap the Flashlight button ."
- "If the photo is blurry, clean the front and back camera lenses with a microfiber cloth. If you see dirt or debris inside the lens or if the camera lens appears to be misaligned or blocked, contact Apple Support to discuss service options.
- Restart your iPhone, iPad, or iPod touch.
- Test the camera again by taking a photo. If your device has a front and rear camera, check if one or both isn’t working. To switch cameras, tap the rotate button ."
Make sure to complete all the steps listed here. If you continue to have issues after those steps, reaching out to Apple is the right next step for reaching a resolution. You can find their contact details via the link included in step 1 in the second set of steps above, and via the link below.
Contact - Official Apple Support
Take care!