How to get a drop-down source list for ADB Firestick

I successfully installed the ADB integration, and I can create Mini Media Player cards for my Amazon Firesticks.

But when I click on the source drop-down in the Mini Media Player cards I only see the currently selected app. Is there a way I can have a list of available apps in that drop-down such that I can select the source I want the Firestick to run?