All USB is 5V, there's no place in 'pure USB' for the Qualcomm QC voltages (9V and 12V), irrespective if one considers micro USB or type C.
Strictly speaking, higher voltages are not required for QC, as 5V @ 3.6A is exactly the same wattage as 9V @ 2A or 12V @ 1.5A. They are negotiated between...