I have a slicer for locations on my report page next to a map visualisation. the slicer format is a dropdown box. I want the slicer to display the selection i have picked on the map visual. For example if i click into the data point for London, i would like the slicer to display that london is selected. I have tried to solve this through editing interaction but am yet to find a solution. I also tried to use a card instead of a slicer, this worked however when no locations were selected, it shows the name of the first location which may confuse users.
in this picture i would like the location slicer to match what was in the map visual.