WDM22 - Android Push Notifications (no replies)

Hi All

How happy I was with Android Push Notifications until V22 when this FireBase stuff was introduced. I cannot get it to work. Questions:

1. Is there no way to use the old method and if so how?

2. I have set up everything as per the notes without incident but no notifications come through at all.

Does anyone have any idea what I may be missing?

Cheers
André