Everyone knows that the content of the notification is encrypted, BUT THIS IS NOT ENOUGH:
https://www.privacy-handbuch.de/handbuch_73.htm
Requests to the PM Team (for example, for the implementation of Unified Push) have been ignored for many years.
For some people, using a safe ProtonMail app with a dangerous FCM can be a disaster in some countries (journalists, signals, political opposition, etc.)
Please repair it!