There's a topo layer in Organic! Close lines means (potentially) lots of exposure. That's not a silver bullet, though, as sometimes the topo shows nothing special, but when you get there you can have some exposure. Doing true exposure on a per-segment basis would mean a new key I think, not to mention how much additional data this would require for the maps. If you're worried about the terrain to the point of needing highly detailed topo maps, it's probably better to get one of the many such maps in AllTrails (though the app is rather clunky)

As with all things outdoors, technology will only ever get you so far. Situational awareness and emergency preparedness are skills you should have if you're going somewhere you've never been before. Always prepare for more than you expect, and if you're not sure that you're prepared once you get to somewhere sketchy, it's always best to turn back.