How I understand it is : Gpu Display port to Motherboard display port X2. Then from that it **should** work like advertised on the Caldigit website, that being one single thunderbolt 4 cable from the motherboard to the dock and then a monitor plugged in the displayport port and the second monitor plugged into a thunderbolt4/USBC4 via a displayport adapter... Though, I have to look into it better to see what kind of dual screen Caldigit speaks of, is it two independent displays or a simple mirroring? From the screen shots it looks like 2 independent displays...
Just the fact of getting to the bottom of it makes me want to get it
(If only Apple would accept MST, the monitors could be daisy chained and that would be more simple...)