I have support for HC32F460 working (since Jan 2022) for the Voxelab aquillas that use it:
further dev info: Voxelab Aquila HC32 Klipper · GitHub
I could do more if I had the mainboards for the other vendors - anyone have a leftover (some have given up and replaced them)
I have not pursued another PR since the Voxelab interest seems low, but now if Ender (Pro 2) and other more mainstream manufacturers are using HC32F460, I can start the process.
S