Increasing mi/kWh

I have a 2024 ionic 6 SEL AWD and most of the roads I drive on have a speed limit that are 45mph or 55mph. I typically am getting 2.5-2.8 mi/kWh and wondering what I can do to increase this number.

I typically leave my regen on Level 0 so I can coast and when I am in down doing the stop and go I increase to Level 3. From my research, because I have an AWD it’s actually better to drive in Normal mode instead of Eco. Maybe that’s incorrect?