Cant add channel

I am trying to setup custom channel in home assistant companion app to make sound different for alarm…

I have this typed in YAML on alarmo but it still doesnt appear. Any idea what i might be missing?

service: notify.mobile_app_sm_s918u1
entity_id: null
data:
message: “The alarm is triggered! Cause: {{ open_sensors }}”
title: Alarm Triggered
data:
push:
ttl: 0
priority: high
channel: Alarmo

https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question/114371