I really doubt the difference between a 1700 lb (1980 honda civic) and a 5600 lb (2020 escalade) vehicle matters that much in a collision with a pedestrian. from a conservation of momentum standpoint, the 1700 lb car already weighs so much more than a person that the additional weight from a modern SUV has little effect. either way, the vehicle plows straight through with minimal loss of velocity. the bigger issue with SUVs is the clearance; a pedestrian is much more likely to be run over by and SUV, rather than thrown over the hood of a small car.

That represents a greater danger in vehicle-vehicle collisions, but I doubt it's anywhere near as a large an effect for vehicle-pedestrian collisions.

It's possible, though, that the larger vehicles represent a greater danger due to poorer visibility. I don't have enough experience driving a contemporary truck or SUV to know the driver's experience, but I do know that, when parked along the street, they present a serious visibility problem for pedestrians compared to coupes and sedans.