My Watch app receives push notifications containing location information and I use that info to show a WKInterfaceMap.
However, when I tap on the map in the notification dynamic interface, my app is opened instead of the Maps app.
I found this forum post stating:
There is no url to call at this time. The user tapping on a WKInterfaceMap object is the only way to launch the Maps app from yours.
Does anyone know why this does not work with WKInterfaceMap objects in a notification?
Since notifications are not interactive, it's not possible to trigger any object interaction in a dynamic notification. Tapping anywhere in the notification area will always launch your watch app.
This is briefly mentioned in the App Programming Guide, under Designing Your Dynamic Interface:
Tapping your notification interface launches the app, so notification interfaces should not contain interactive controls.