Elevation tracking while scrolling route on route builder

When building a route, you can scroll along a route to see your cumulative distance t a certain point. I’d also like to see how much elevation gain the route has add as you scroll along the route. So on a 100mi ride with 10,000 feet of vert, it would be nice to see at mile 80, the route has also climbed say 9,000 feet at that point. The current elevation at that point is not useful.