Yes - I own a non-AP Model 3 and can double-confirm. Right scroll wheel up/down controls cruise speed, left/right does nothing.
It's still 1000x better than the cruise on my last vehicle, which was buried in one of the 427 buttons on the steering wheel just to turn it on so it COULD be engaged, followed by a different one of the 427 buttons (which had to be pressed in exactly the right area of the button) to actually engage it. Even after 5 years I could not do this by touch, and using the cruise control required several seconds with eyes off the road - only ever happened on VERY long trips.