Hi,
I tested the below hardware now.
Kernel 5.10.0-3 with device_tree from the same kernel (5.10.0-3):
armhfCard arm64Card
Rpi2b Success NotPossible32bitCpu
Rpi3b Success Success*1)
Rpi3b+ Success Success*1)
*1) Digital audio not working (HDMI)
Success means Gpu (Kde) and analog audio work!
I do not have the hardware for Rpi4b.
Best Regards,
Evald