[tabifolk]

According to the Fly Denver website

Escalators and elevators can be used to descend to the train stations. Elevators are located in the terminal’s two security-screening areas and in the central areas of all concourses.

And the Denver website says that

DEN Shuttle buses with wheelchair lifts operate between the outlying car parks and the terminal

So… it seems the shuttles, while accessible, will only get you to the car parks, not into Denver itself.  I guess the train is best.

I believe that @twoboysmom00 is near that area and can maybe add some info?