It’s a battery diagnosis of the state of charge window in each is the current counting parts of the cell supervisory circuits to measure Ah status against new.
So no nothing do with with range, but you already knew that as you are a smartarse yeah? just not quite cracked the smart bit yet?
I was taking about ICE vehicles. Their range varies depending on a wide variety of factors. Speed being one.
So when someone starts taking about guaranteed range, without mentioning the variables they really don't know what are talking about.
As for EVs SOH of a battery is an entirely different subject. Since you can fix bad cells, or replace a battery in theory you can get a old EV back to 100%. In fact as technology improves you might be able get a bigger battery than original sold with the vehicle.
Some have upgraded batteries in Leaf for example. https://www.youtube.com/watch?v=FVxEOETTWnQ&ab_channel=FullyChargedShow