I moved over from my old Android to an iPhone (needed to develop an iOS app for a freelance thing too) and that was the first thing that cause me off guard - it’s like controls that should be buttons of some kind were just omitted.

Its just as bad. Please define ‘back’

Even thats slowly being depreciated for gestures as the default option. A bunch of Google's own apps won't play nice with it anymore on the flagship Pixel, drawing buttons underneath