? Can’t Control Home Accessories
Sadly, one area where Siri won’t be able to help you offline is with HomeKit accessories. While you obviously need at least a local Wi-Fi connection to communicate with your home accessories, your home network doesn’t necessarily need to be connected to the internet when using the Home app to control them. This is especially true for Bluetooth accessories.
Unfortunately, Siri does need an internet connection to handle HomeKit requests at this point. This means that even unlocking a Bluetooth lock on your front door won’t be possible unless you’re online.