2023 Audi q5 HPEV electrical mileage surprise.

When l first got the car new, the panel showed the mileage was 32 at full charge. (I use 220 V, usually it takes three hours). Gradually, that number is getting higher, at one time it was 42, it varies. In real life driving, at 4000 miles, most of them is electrical, the electrical range increase from 32 miles to 37 miles. That is a pleasant surprise. What has been other owner's experience?