I’ve owned and worked on a few cars that normally wear the rears faster than the fronts but it’s rare. One thing I noticed is the 2018 and up Expeditions have only one rear brake pad offered from Ford and the pad contact area is very small. I switched to the Hawk pads that have a larger area so I’m wondering how the wear rate will be but don’t have enough miles on them yet to tell. Some of the F150’s with heavier tow packages do get a pad with more contact area but seems the Expedition asks a lot of its rear pads.