LiDAR scanner in the triple camera housing on the back (a large black dot behind the glass)
smaller rear-facing microphone (a black hole in the glass)
decidedly flat-edged chassis, as opposed to a round-edged one
The colored finish of the phone borders the display and is usually much more visible from front (dark grey or dark blue example in post #4287775). The phone is typically a dark grey, dark blue, silver, or gold finish.