Check the specifications for AMD 2700x 3070 3800x/xt or 9700k/9900k.
Check the specifications for AMD 2700x 3070 3800x/xt or 9700k/9900k.
It varies by specific motherboard; I've heard dates in January and February, and some boards might not support new BIOS updates.
I think you're using the correct BIOS for your ASRock B450M Pro4, which should work with the 5000 chipset. You probably won't need to wait until February.