The current implementation of push notifications is critical from the point of view of data protection and information confidentiality. It would be nice if there would be a variant in which no user data is sent via the "Firebase Cloud Messaging service". You could take Threema as an example here. Threema sends via the "Firebase Cloud Messaging service" only the information that there is a new message. However, the actual message is then fetched directly from the Threema-server. More details can be found here: https://threema.ch/de/faq/privacy_push
Alternatively, it would also be sufficient for us if the push notification contained a generic text such as "There is a new message". The user can then open the app manually.