Charging the PinePhone attachedthe PinePhone keyboard plugged into a single usb-c plug did not work satisfyingly, neither plugged into the keyboard not plugged into the PinePhone. In both cases, the PinePhone did not charge completely.
The only way the PhonePhone charged completely was by detaching the PinePhone from the keyboard, and charging Phone and keyboard separately by connecting it to usb-c power source.
To take apart PinePhone & PinePhone for every charge cycle is not very handy, but we do not know how to solve this better.