I've checked my EV mode distance many times as I drive roads with few stops and 30-35MPH limits. I checked it again twice today and got 1.4 and 1.6 miles on a full battery. Both times I was going a little over 32 MPH and tapped the brake to stop the ICE and then set cruise at 30 MPH in EV. Today here in South Florida it was over 90 degrees but my same test in 70 degrees was the same, about 1 1/2 miles.

I'm sure a slower speed and without the cruise where you let off and coast some, you could get more distance. If I had let off the gas (cruise) and coasted to a stop, I might get 2-2 1/2 miles out of it. I find my battery is recharged in about 2-3 miles from the ICE.

I increased my tire presure to 42psi in the rear and 41psi in the front and found today I could stay at 35 MPH longer in EV. It didn't help EV distance at all.