It sounds like how the pedals react and one-pedal driving are the reasons they suspect? I was expecting touchscreen-only controls to be mentioned, but for all I know new ICE vehicles are like that too.
Older models have some of the above on stalks.
Beyond the wheel you've got window controls, gear selector, map lights, buttons and levers to open the doors, a gas and brake pedal, I think that's it
That said, you mostly tell the car what to do with voice commands. "Defrost the windows" or "open the glove box" or "drive to Costco" etc.
Edit: Hazard lights too
I’d expect them to be on versus more trained than the general population. Cars are their work tools, they spend a lot of time in there.