The only USB-C to Lightning cables that fast charge are Apple.
See this by Gruber;
https://daringfireball.net/2018/11/third_party_usb-c_to_lightning_cables
USB-C to USB-C, Anker cables work. Any other manufacturer I’d advise lengthy research.
See this by Gruber;
https://daringfireball.net/2018/11/third_party_usb-c_to_lightning_cables
USB-C to USB-C, Anker cables work. Any other manufacturer I’d advise lengthy research.