The regulation calls out 19 vehicle functions which must have physical controls inside the vehicle, with additional requirements about size and usability of the buttons.
Those functions include:
Turn signals
Hazard lights
Horn
PRND gear shifter
Driver assist function, if present
Windshield wipers
Windshield defroster
Power windows
Emergency call system
Power off switch for EVs
in my BYD, three fingers up the touch screen, temp goes up (or down if you drag down) You can adjust the fan speed if you’re want with swipe three fingers right/left on the touch screen.
That said I’ve adjusted it maybe 3 times in my 14 month ownerships, that’s the entirely point of climatecontrol and the buttons right there on the touch screen as well and without connected series I can prewarm or preheat the car fron the phone , i cant be assed but my HF does on a cold morning as well as turn the heated seats on
I can also say "Hey BYD my balls are cold"and it turns the seat heater on