Widget for Edge Explore to control music on phone.

My garmin watch came with a widget that allows me to control music on my phone.  I just purchased an Edge Explore for my bike that also connects to my phone via bluetooth.  However, it has no widget for controlling the music.  I'm a developer, but have not yet made any widgets myself.  Does anyone know if it would be possible to make a widget that would do the same as the one on my watch but work on my Edge Explore?  The widget on my phone seems to hook directly to my music app on my phone which is Amazon Prime music, so I'm suspecting there is some kind of standard to communicate with the phone's current music app.