Tesla claims that their drive unit (which includes the motor, inverter, and gearbox) efficiency on their latest models is 93%.
Making something that performs well at freeway speeds, yet also is efficient when manuvering round a parking lot is hard.
Most companies just hope you don't care about only getting 5% efficiency round the parking lot, because that isn't a large fraction of your energy budget, even when it's so inefficient.
Motor efficiency aside, a total “energy spent for distance moved” accounting will look bad at such low speeds, just because the car has to power non-motor systems and they use energy at the same rate no matter how fast you’re moving. Peak efficiency in a Tesla is at around 25MPH.
https://x-engineer.org/automotive-engineering/vehicle/electr...