Can I use my iPhone 12 for Pro Photography?

You can and that depends on the level of Pro Photography that you want to accomplish.

The bottom line is that there is no phone device, with a built-in camera, that can even come close to SLR Digital camera results. For example, you will not see wedding photography entirely done on a phone camera. The phone cameras of today, do not have the range to perform like SLR cameras with large sensors and a collection of multiple focal length lenses and light sources.

Axel F.