Setting up devices in the Home app
The HomeKit software is built into macOS, iOS, iPadOS and even tvOS on the Apple TV box. However, you control your HomeKit–compatible lights and other devices using the Home app, which is primarily focused on the iPhone and iPad. There are versions of the Home app on the Mac and Apple TV as well, but these don’t allow you to add new HomeKit devices to your setup.
Of course, any device set up in the Home app can also be controlled using Siri voice commands — such as “turn on the kitchen light” or “lower the volume” on some music playing on a speaker.