I'm not sure if a thread has been created about this yet (I couldn't find one) but I was able to swap the factory 11.6" stereo in my 2018 Prius Prime with one from a 2021 Prime. It was a direct swap and very easy- only 2 bolts holding it in and all the wire connections were the same. Now that these cars are becoming a few years older it looks to be easier to find 2020+ units from wrecked cars. After looking on and off for the last year I just scored a 2021 for $280 from a car that was wrecked with only 43,000 miles on it so the unit is like new. I still would prefer physical climate knobs some days but the Apple CarPlay has given the car a bit more tech life!
Nice - I assume you had to match the serial number from your old 11.6" display to the 2021 one, correct? Also, is Carplay wired ?