Whether in a EV or ICEV, the proper term is "accelerator" pedal. Even in gasoline-powered cars, the connection to the actual throttle has been indirect for many years.
Diesels also don't have throttles; they run unthrottled, controlling power by how much fuel is injected (I had a Rabbit diesel many year ago). With an occasional odd exception like old ('60s-70s) Mercedes diesels that did have a throttle, with the fuel injection controlled by a vacuum modulator; you shut down the engine by shutting off the air supply, not the fuel; yes, they did smoke, badly.