If you are serious about doing photography with your iPhone, I highly recommend this utility: Metapho. This small photo utility shows all the meta-information that sit within each photo you take with your device. The latest update introduces support for the latest iPhone 11 camera features, one being able to show which mode the iPhone used in low light conditions.
This is an extension to Apple’s Photos.app too so you can use it within the app or run it as a stand-alone one. Give it a try now!