See that reflective blob around the sun? If it were high end glass, it would have a
starbust effect with 7 or more streaks. Also note the distortion in the upper left corner. That would not be there with high end glass. Finally, if this were shot with high end glass, a tiny aperture would have been used to bring as much as possible into focus. Close examination of the photo reveals that the distant hill dead center is out of focus as a result of the iPhone's humongous f/2.2 aperture, which only could focus effectively at the photo's mid-distance range.
I'm only a beginner and I could spot all the tells that this was from a point and shoot camera.