Hi
I want that function in Shortlist too so you can add supporting layers that appear/disappear based on which tab you click. Shortlist currently doesn't support tab-specific display of supporting layers. If you are a developer, or know a friendly one (like all the ones on Geonet), it is possible to add that into your Shortlist by customizing the code.
Story Map Series lets you set up tabs that show different layers, different layers, or even completely different maps, when readers click on them, but Series doesn't show places in a side tab like Shortlist does. However it may be worth looking at too if you want to show a different set of layers on a different maps.
Rupert