I just stumbled on Lamonster's video about installing floorboard risers on 2020 and later RTs. I've whined about an adapter in the past and now it looks like it is here. I even tried a mock-up (2x4s) to see how much I needed and 1 1/2" was about perfect. And that's what Lamonster offers. They're ordered and will be here and mounted soon.

I'm 5'5" and while the stock height works ok, a little higher will be way more comfortable. The decision was made the instant I saw them.