Hey @Product and UX Team! Daniel from Customer Support Engineering here  
 

iOS- We only support a single PEM file and Apple requires a unique PEM file for each app (Android does not have this limitation). So you can have multiple iOS apps on a single Intercom workspace but we can only support push to a single app due to the single PEM file support.

Android - Multiple apps on a single workspace is supported. For Android push to multiple apps is supported by using the same FCM App (where you get the FCM API Server Key to use with a workspace) with each of your different Android apps. You'll need the FCM API Server Key configured with the workspace and having the google-services.json file configured with the correct app package names.