Google Assistant GA - Arm Alarm

Hey good folks,

I’ve setup Google assistant which has been happily working with my lights and switches which appear in GA and then I do whatever I need to do with them.

I am quiet the way through setting up through MQTT Manual Alarm with most of it being done in NodeRed to much happiness.

Now I want to be able to tell GA to ARM or HOME ARM, problem being I am 3 hours in and known the wiser about how to get something other than a switch or light to appear in GA. I have read that I should put code in script.yaml which I did rebooted and then did a call service on “google_assistant.request_sync” but nothing new come up in Google Home app.
in scripts.yaml

armed_away:
  sequence:
    service: alarm_control_panel.armed_away
    entity_id: alarm_control_panel.ha_alarm

I am NOT using the HA cloud.