Pickup trucks are the auto industries "cash cows". Some of the larger models can cost well over $70K, yet the actual production costs are not much more than cars/SUV's costing half that much. When I was working, I serviced the computers at a couple of the big production plants in Kansas City, and I saw some of the data relating to the costs. That was many years ago, but if the percentages are similar today, the profits on trucks is still huge.
At the bare minimum, these auto plants should give the underbody/chassis a good layer of undercoating to help control any tendency to rust. These pictures of rusted axles, etc., are probably due to their storage outdoors for an extended period of time, by the subcontractors who supply these parts to Ford.
There is also a problem with a shortage of "chips" for all the on board electronics in today's vehicles....due to this virus and a huge jump in sales of computers for those working from home. This has led to a disruption in production and probably a lot of parts laying around for an extended time before they are actually used.
If I were buying a new truck.....and maybe even a new car, I would ask the salesman to run it into the shop, and put it on a hoist, so I could inspect the bottom of the vehicle.