Nothing to be concerned about, my 2019 has done it since day 1. My wife’s 2020 Explorer ST, has done it also since day 1. Her previous 2014 Explorer Sport did it as well, although no where near as much as the 2020. These things are just Rolling Computers now, with a Fantastic Suspension
Neither of 2010 Raptors made any such noises, but they were NOT, SAUVE AND DE-B O N E R as are the Gen2 and the Elitist Gen-Tre’ Models…
I do know for a FACT, that during that “Noise Fiesta” the NSA, FBI, DOJ, BATF, NAACP and the NCAA are all remoting into your hard drive, which in turn, opens the Gateway to your home internet connection and anything you may have connected to it. They share/sell all of your secrets with the highest bidder.
The only way to prevent this illegal intrusion is to back into your garage with the nose facing NE. Line the Garage door with lead inserts and aluminum foil. After shutting down, open and close the drivers door 3x, rapidly. Slowly, open and close the Tailgate 2x.
This has worked for me for the last month