i'm using this ZF3 car holder and this USB A to 2 USB type C cable to power the holder and charge the phone, and it works with the phone open and closed. to hold the phone closed, i shift the "hands/grips" part of the holder so they're vertical. when the phone is opened, the "hands/grips" are horizontal. see pics below; the yellow circle and check marks identify the USB-C connections. as an FYI, Android Auto works perfectly with the splitter cable.