Is this a joke? Do you release a completely rebuilt app, and UnifiedPush is still gone? Users of degoogled phones will still not have notifications? Will you still only use Google FCM?
Why Google (FCM) notifications on Android are dangerous:
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!