So, from Bosch's electric power steering product page they say their system which has a servo unit on a second pinion (like the Model 3 system) can exert about 9kN or about 2000lbs of force on the steering rack.
The steering knuckle is 4 inches from the center of the wheel.
2000lbs*4inches = 666lb-ft of torque
The Model 3 steering ratio is 10.3:1, so 65lb-ft of torque at the steering wheel.
The Model 3 steering wheel radius is 7 inches so that's 111lbs of force at the edge of the steering wheel. Obviously if you got your body in the right position most people could do that but I don't think it's something that most people are going to be able to do from a standard driving position.
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