Rockchip is something that being used in Chromebooks, i don’t think microsoft that generous. And i’m talking about raw perfomance. RasPi is 4 cores, 1.6 GHz, rk3399 is 4+2 cores, with 1.2 and 1.8. Everything else doesn’t really matter, because even with help from community, RasPi don’t even have GPU drivers under Windows, which leads to software rendering of EVERYTHING. You should already know, that x86 apps even with snapdragon chip are slow. And how much snapdragon have? 8 cores with 2.0 Ghz?
My point is that yes, technically it’s possible to adapt that for rockpi4. I can’t argue with this. Will you able to actually work with this? No.