How can I make a trigger that goes off when I set a timer on my atom echo, then it goes off. I don’t see a state I can use in order to trigger it. Like if there were an “alarm state” or “timer state” entity that could say what the status was, either alarming or not alarming, so I can use that state to trigger larger speakers.
I think you are looking for this
The esphome voice assistant component has on_timer_xxxx options that triggers on timer states
The timers are local to the devices, they do not have corresponding entities in Home Assistant. As I understand it, the dev team is still testing and making decisions about the best way to handle this.
If you want to experiment, you might want to consider using the homeassistant.event action to post a custom event similar to the way timer entities use events.