The transmission in an EV has oil in it, like a regular car transmission. Or did you think it was a motor directly on the wheel. There's a differential in that transmission too, just like a regular front wheel drive car
My UK cousin has an electric Skoda. One motor for each front wheel. No transmission. She has had it nearly 3 years. The SOC is 92%. Servicing costs in that 3 years were £152 which included brake fluid replacement and front disc pads
She has figured out it costs less than 1/4 of her previous Golf 2.0 to run