Hello euromad,
We would like to see how we can help you with your Camera Settings. Let's try switching Settings > Camera > Preserve Settings on and back off, and then restart the iPhone. Follow the steps in this link to restart the iPhone, and get back to us with your results: Restart your iPhone - Apple Support
"How to restart your iPhone X, 11, 12, 13, or later
- Press and hold either volume button and the side button until the power-off slider appears.

2.Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
3.To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."
Get back to us with your results so that we have a better understanding of the issue, and we can go from there.
Cheers!