I believe he means the Home Assistant instance is not exposed to the internet, but it's bridged to Homekit which is available outside his home network. I have the opposite setup: my Home Assistant instance is available off network, but I don't have a Homepod or newer Apple TV so I can only use Siri to control it at home.
Can people not access the Home Assistant through Homekit?
Sorry if I'm asking obvious questions, I haven't tried any of these, not even Alexa or Google's one. I don't even think they're available in my country (Slovenia) and they don't really have a lot of useful Slovenian information.
On a surprising note: The language recognition had become really good for Slovenian!
Home Assistant has both a HomeKit bridge integration to let HomeKit control HA devices (what I use) and a HomeKit controller integration to let HA control HomeKit devices. The first one is limited to your local network, however, unless you have some sort of Apple hub like a HomePod or recent model AppleTV to stay connected to Home Assistant.
