IIRC the Tesla Roadster had a 2-speed transmission initially, due to engineering challenges with high-rpm bearings. But they struggled with the engineering challenges of high-torque transmissions, and eventually sorted out the bearing issues and went back to 1-speed.

Most EVs have a single-speed gearbox. A few have multiple gear ratios, but it's not common.

(It's not unusually for ICE vehicles converted to EV to retain a manual transmission, but conversions aren't being done in large numbers.)

They have gearboxes with a fixed ratio that is optimal for the vehicle, some have variable speed gear boxes 2-3.

The motor isn’t just connected to the drive train in 1:1 that won’t end up well for neither the drive train or the motor.

Porsche Taycan has a 2 speed transmission: https://www.caranddriver.com/news/a28903274/porsche-taycan-t...