Nor (in all likelihood) can they, without additional effort on your part.="evnow"
...What I ultimately want to find out is - how many miles can I go if I'm getting, say 5.0 m/kWh on the dash. That is a question these lab results don't answer.
I know the answer for my LEAF for 5.0 m/kWh on the nav screen is presently ~81 miles from "100%" to VLBW, after recharging at ~75F, but that is only because I know that CarWings presently reports ~16.2 kWh used between those SOC levels.
But I'm pretty sure the ~16.2 kWh number is incorrect for my LEAF, and I don't think there is any reason to expect it would be correct for your LEAF, or for any other.
So while knowing the kWh capacity reported by CarWings, which is used to display the m/kWh on the nav screen, and (with ~2.5% miles error) on the dash is invaluable for my trip planning, it could never tell me what my actual kWh use was without a reference test, showing accurate kWh use in a controlled constant speed range test.
And now, with these test results, I believe I just may have the data I need.