Some do, some don't. The Koenigsegg hybrid (so not strictly an EV, but can be operated as a pure EV) famously don't have a gearbox but a single, fixed reductio

Some do, some don't. The Koenigsegg hybrid (so not strictly an EV, but can be operated as a pure EV) famously don't have a gearbox but a single, fixed reduction gear. There is a hydraulic coupling for the electrical motors to allow slow speeds. At higher speeds the coupling is mechanically locked to directly connect all engines to the wheels. https://en.wikipedia.org/wiki/Koenigsegg_Regera https://en.wikipedia.org/wiki/Koenigsegg_Regera https://www.koenigsegg.com/car/regera/ https://www.koenigsegg.com/car/regera/