In practice I haven't seen USB PD 1.0 in the wild. Most of the non-PD charge standards signal charge rates using varied voltages on the D+/D- lines.

When current manufacturers claim USB-PD they mean PD 2.0 which requires the CC line (Only included in usb-c to usb-c) to signal and set the voltage. When PD 3.0 is included, they usually call it quickcharge 4.0 or PPS.