Except for jokes: it turns out that Toyota engineers experimented with a prototype electric car, which was equipped with a “mechanical”. It sounds like complete nonsense, because the transmission in the usual sense of EV, of course, is not needed. The Japanese did it for the sake of fan.
To be more precise, there was no gearbox physically in the Toyota prototype – only imitation of shifts, traction break and sound😎
Toyota tried to understand how much such a chip can be in demand among those who choose an electric car, but are bored with the “mechanics” and want to periodically break away by changing gears manually. It is unclear what they decided in the end.