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I have a friend here in UK with a 2020 M850i Coupe x drive. It is factory
fitted with Michelin Pilot 4s 20" non-run flat tires. I have ridden as a passenger in the car for 200 miles on various road surfaces here in the UK. The tires were quiet and comfortable on all the road surfaces. We have some poorly maintained roads and motorways here which are in need of resurfacing which create tire noise.
I do not know if your cars in the USA come with factory fitted non run flat tires. If you are on run flats you could try changing them to non-run flats.
I hope this helps.
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