Just out of morbid curiosity, what is in a "fully loaded" button panel for a 2018?
There are six positions, but all I see in the owner's manual are (1) flap release, (2) immediate charge, (3) steering wheel heater, and (4) ProPilot. What would go in the other two? User-defined, like my proposed "flap ajar" indicator?
FWIW, the blanks for a 2018 are Nissan P/N 68492 5SA0A. List around $10, street around $6 + S&H.