Just thought I'd share a successful upgrade to our 2020 Sport. Great instructions in this thread, though I really wish I'd read the directions re: removing the front door panels more carefully. i broke the big square clip, but luckily the dealer had one for $5.
I went with a set of kickers from Crutchfield. I went with the biggest ones that would fit in the front doors as well as rear (could have also gone with the rears in all 4 locations). I used their adapters as well as the wiring harnesses. I bought some foam weatherproofing from home depot to ensure the adapters sealed up OK. Sound quality hugely, hugely improved. Pretty impressed that the stock amp is as powerful as it is. I probably would have gone with the Hertz speakers if I'd read more carefully here due to the increased sensitivity, but the kickers work great.