It's not too weird for a "work van" in the US to have metal all around the back and sides instead of windows - https://en.wikipedia.org/wiki/Mercedes-Benz_Sprin

It's not too weird for a "work van" in the US to have metal all around the back and sides instead of windows - https://en.wikipedia.org/wiki/Mercedes-Benz_Sprinter#/media/File:Mercedes_Sprinter_rear_20080102.jpg https://en.wikipedia.org/wiki/Mercedes-Benz_Sprinter#/media/... And if it might be like a U-Haul truck where it's stacked with boxes, the mirror would be occluded anyway.