On the Model X doors dialog, have an option to open the charge port door.
When I arrive at a (non-supercharger) charge location, I park the car and the Doors screen presents itself. Then if I want to open the charge port, I need to close the Doors dialog, open the Charge dialog and then press “Open charge port”.
A tap on the charge port door opens it. There is no need to press anything in the car.