Note for future notifee users - possible cause of no sound / deep linking not working on iOS

[lucaslcode]

Just for future googlers etc, we switched our ios app to use the service extension so we could include images in our firebase notifications.

However, our deep linking stopped working, and sounds also were not playing.

It turns out, the service extension doesn't keep many properties on the original notification when it goes through the service extension. In our case, we had to add our data and sound: "default" into notifee_options. (Our deep linking used an id present in data). All working now!