Sounds like they were driving at consistent 65 mph. Where-as optimal speed for maximizing range is likely closer to 45-55mph.

They also ran the AC/heat with cabin set at 72F. With them doing the driving not on a track but real life (stop & starting).

Technically speaking the EPA numbers aren't necessarily "real life". Its a repeatable test environment: https://cleantechnica.com/2020/08/18/how-does-epa-calculate-...