Go to "topos" on the navigation bar. By clicking the arrow next to "All sectors" you will see the sectors you have just added in the map view.
To add Premium topo images and routes, make sure you're in the "Premium topo" tab. Select the correct sector and click "+".
NOTE: Premium topo images will remain hidden for people outside of the team until you send it to evaluation and it's published.
Free topo images are visible to everyone right away however there is a content limit for free topos with a maximum of 7 topo images and 20 routes. So if the topo is bigger than that, it needs to be published as Premium.