Possibly interesting data point: I own a VW ID.4 in Europe. I found the range that the car displays to be quite accurate, regardless of the season. I was also surprised to find that I'm often getting kWh/100km numbers that are better than the manufacturer's numbers, especially in city driving.
This was weird, because I got used to gasoline-powered car numbers being wildly unrealistic.
(BTW, I have the model with the heat pump.)