There are side air bag assemblies in the 'C' pillars and they can vibrate against the trim or surrounding metal. You can do a generic search and find the ways to fix this, doesn't look like too bad of a job to fix. My 2019 GT rattled like crazy on certain pavements.
Dent Wizard
2416 S 19th St
I had them repair a Grand Sport rim for my Corvette. It was a bad curbing about 6 inches long and they repaired it perfectly and could not see that it had been repaired.
2019 Mustang GT base 18" wheels and tires for sale. They were taken off the car at 2k miles. The rims are perfect with no scratches or dings and the tires are perfect with only 2k miles. Asking $450 or best offer, with local Phoenix West Valley pickup only.
There are similar threads, but they don't quite explain the details. When at the drag strip, does turning off advance trac also turn off traction control? What is the common consensus about which would be the most beneficial on a stock 2019 A10?