Most people only own one QC device - phone. So in a multiport device like II 20000 you'd have overkill all 3 ports being QC. In one port smaller powerport it would primarily be used for phones, hence QC.
If you look across nearly every Anker product they have that paradigm, usually if there is QC it is single port.
This is why QC as a port and charging tech has to die, it is a dinosaur when compared with USB-PD. Inside the phone obviously you have QC to intelligently charge the battery but that's true of every phone you have to alter the charge to the battery, with a progressively higher voltage and lower current and lots of stepping from the input power, just I don't see why the input can't be USB-PD over USB-C then we have one universal port, one universal power delivery, and differentiation is inside each end of the wire over the USB-PD standard. It would vastly simplify everything.
The children suffer as the adults bicker.