If you drive spiritedly for the last 40 miles and then fill your tank you can watch your DTE increase while adding miles lol. It's dynamic and reasonably accurate imo.
Yeah, my PB's range seems always low when I fill up. Like between 535-575 MTE. At halfway it is usually still above 300. When I hand calculate the mileage from fillup to fillup it is typically between 19.5-22 mpg, which on a 30.6 gallon tank which runs from 597 miles in the tank to 672 miles in tank.
This lends creedence to the earlier posts that the initial range when full seems less accurate, but it gets more accurate as the tank is used. By 1/2 mine seems pretty close. As an aside, I feel my range on the 2022 EB did not display this trend. I felt it was pretty much right the whole time.