What is the correct way to pass the collected workout data on the apple watch to the iOS app for display? Should I do this using WatchConnectivity or is there a special way of communication designed for workout sessions.

My iOS app configures a workout and passes this configuration to the app on AppleWatch, which starts workout sessions from the received configuration. The new data on the watch appears in the workoutBuilder(_:didCollectDataOf:) method but how to pass it to the iphone?