IIRC you have to expand the whole trip to see the charge level estimate. It looks like by default they only show you the next turn or two in nav, thus hiding the estimate (going and coming). Seems like if you expand the trip/route the map zooms out to show you the whole thing as well.
I think v8 was the same way.
It works that way for me also in 36.2. I recall the first time I saw a round trip estimate, it showed right away. I'm not sure if it's a distance (number of steps in the directions) thing or if something changed over time.