Does the USB-C Digital AV Multiport Adapter transmit 4K 60Hz signal from M1 MBP?
I just tried plugging a 4K monitor into my M1 MBP using that adapter, and it only gave me options up to 30Hz at 4K.
I also didn't see any M1 Macs listed in the 60Hz list. So I suspect that all the M1 Macs will only run at 30Hz using a 4K screen on that adapter.