Can I use Elixir to send push notification to fcm client directly without using xmpp server?

Hey, I want to ask one thing about fcm push notification through xmpp client romeo. I don’t want to use a dedicated xmpp server for authentication and routing. I want to use existing Elixir backend for authorisation and routing of push notification.

Can I do it like elixir backend send notification to fcm user directly by using romeo without sending to any xmpp server?

I think discord did it?