The upfitter AUX switches appear to be Ford, same for the AC controls.
Ford supplies the ICE engine, transmission, suspension, steering wheel, and instrument cluster, so that tracks. https://fordauthority.com/2024/10/new-usps-mail-carrier-uses...
Also the if you trace LoS in the cabin pic in the article you would find what the driver wouldn't see more of the hood because he need to be sat quite a lot higher (up to 20cm I think) to gain the view you are thinking of. And this is incompatible with 'do the mailman thing without getting out of chair'.
https://www.nalc.org/news/the-postal-record/2021/may-2021/do...
That is a little weird, now that I look at it again. But the way you'd use the rest of that bottom space would be by lowering the driver, basically, and that would mean the driver's not as high up over the hood. So maybe getting the higher angle gains more visibility than having them sit lower just to maximize usable windshield area? (The only way you could have both is if the dashboard was transparent.)