If you have started the ride with a route that includes climbs, then a button with a “peak” icon is displayed at bottom right with the profile of the various climbs.
What’s more, when you get close to one of these climbs, a new “Live climbing” page appears.
It gives you a live view of your position on the climb and its profile, so you can manage your effort.
At the top, the “Live climbing” page disappears automatically.