Payload yes…not sure about fuel
On PC
The flight_model.cfg file (simple text file edit with notepad)
C172 (change UrName to your name)
C:\Users"UrName"\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Official\OneStore\asobo-aircraft-c172sp-as1000\SimObjects\Airplanes\Asobo_C172sp_AS1000
flight_model.cfg
max_number_of_stations = 5 ; Number of payload stations
station_load.0 = 170, -3.7, -1.1, 0.8, TT:MENU.PAYLOAD.PILOT, 1
station_load.1 = 170, -3.7, 1.1, 0.8, TT:MENU.PAYLOAD.COPILOT, 2
station_load.2 = 0, -6.2, -0.7, 0.8, TT:MENU.PAYLOAD.PASSENGER_LEFT, 5
station_load.3 = 0, -6.2, 0.7, 0.8, TT:MENU.PAYLOAD.PASSENGER_RIGHT, 5
station_load.4 = 0, -8, 0, 0, TT:MENU.PAYLOAD.CARGO, 6
C:\Users*UrName*\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Official\OneStore\asobo-aircraft-tbm930\SimObjects\Airplanes\Asobo_TBM930
flight_model.cfg
max_number_of_stations = 8 ; Number of payload stations
station_load.0 = 185, -15.2, -1.5, 1.5, TT:MENU.PAYLOAD.PILOT, 1
station_load.1 = 0, -15.2, 1.5, 1.5, TT:MENU.PAYLOAD.COPILOT, 2
station_load.2 = 0, -19, -1.5, 1.5, TT:MENU.PAYLOAD.FRONT_PAX_LEFT, 4
station_load.3 = 0, -19, 1.5, 1.5, TT:MENU.PAYLOAD.FRONT_PAX_RIGHT, 4
station_load.4 = 0, -23, -1.5, 1.5, TT:MENU.PAYLOAD.REAR_PAX_LEFT, 5
station_load.5 = 130, -23, 1.5, 1.5, TT:MENU.PAYLOAD.REAR_PAX_RIGHT, 5 ; my dog
station_load.6 = 50, -25, 0, 1.5, TT:MENU.PAYLOAD.REAR_BAGGAGE, 6
station_load.7 = 250, -11.3, -1.5, 0.6, TT:MENU.PAYLOAD.FORWARD_BAGGAGE, 6