You may already be aware, but Apple Home/Siri can talk to Home Assistant directly using https://www.home-assistant.io/integrations/homekit/ which is how I have it set up. You can also have HomeKit devices paired directly with an instance of the HomeKit Bridge, or expose devices in your Apple Home to Home Assistant.
You may already be aware, but Apple Home/Siri can talk to Home Assistant directly using https://www.home-assistant.io/integrations/homekit/ which is how I have it set up. You can also have HomeKit devices paired directly with an instance of the HomeKit Bridge, or expose devices in your Apple Home to Home Assistant.
Out of interest, what API access are you missing?