It’s not. Apple specifically follows the USB-PD standard, and went a long way in getting all the other competing standards (Qualcomm’s Quick Charge, Samsung Adaptive Fast Charge) to become compatible with USB-PD. Now, pretty much every USB-C to USB-C cable supports USB-PD.
Also a shout out to Google Engineer Benson Leung who went on a spree of testing cables and wall adapters for compliance with standards after a charger set his tablet on fire. The work he did between 2016-2018 went a long way in getting bad cables taken off the market.
It’s not. Apple specifically follows the USB-PD standard, and went a long way in getting all the other competing standards (Qualcomm’s Quick Charge, Samsung Adaptive Fast Charge) to become compatible with USB-PD. Now, pretty much every USB-C to USB-C cable supports USB-PD.
Also a shout out to Google Engineer Benson Leung who went on a spree of testing cables and wall adapters for compliance with standards after a charger set his tablet on fire. The work he did between 2016-2018 went a long way in getting bad cables taken off the market.