It's only for 2020 Performance vehicles so far. And probably it will remain limited to those vehicles, since that's the only situation where there is a specific EPA result callout based on wheel size.
It would be cool for them to adjust all vehicles (since it would align better with the trip planner - when you choose a different wheel configuration it DOES impact the trip planner, since it makes that assertion when you change wheel configuration - larger wheels are assumed to be less efficient), but I doubt they will adjust the actual displayed rated range to be closer to "reality."