Here is some information from Apple's support pages that may be helpful to you:
You need a home hub to control your HomeKit and Matter accessories while you're away from home, share control of your accessories with others, and automate your accessories to do what you want, when you want.
support.apple.com
Set up your HomePod, Apple TV, or iPad as a home hub
With a home hub, you can control your HomeKit accessories remotely, grant access to the people you trust, and automate your accessories to do what you want, when you want.
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- Apple TV (3rd generation) doesn’t support remote access for shared users or remote access to HomeKit enabled cameras.
- HomePod and Apple TV aren't available in all countries and regions.
Set up HomePod as a home hub
HomePod automatically sets itself up as a home hub so you can control your HomeKit accessories remotely with the Home app and
create home automations. Just make sure that the iOS device you used to set up HomePod is signed in to iCloud with the Apple ID that you used to set up your HomeKit accessories in the Home app.
HomePod isn't available in all countries and regions.
Set up Apple TV as a home hub
- On your Apple TV, go to Settings > Users and Accounts and make sure that you're signed in to iCloud with the same Apple ID as your iOS device.
- After you sign in to iCloud, your Apple TV automatically sets itself up as a home hub.
To see if your Apple TV is connected as a home hub, go to Settings on your Apple TV. Then go to Users and Accounts > iCloud and look under Home Hub.
Apple TV isn't available in all countries and regions.
Set up iPad as a home hub
- Go to Settings > [your name] > iCloud and make sure that you're signed in to iCloud with your Apple ID.
- Scroll down and check that Home is turned on.
- Go to Settings > Home and turn on Use this iPad as a Home Hub.
Check the status of your home hub
You can check the status of your home hub, like if it's connected, in the Home app on your iPhone, iPad, iPod touch, or Mac.
- On your iPhone, iPad, and iPod touch: Tap
in the upper-left corner. If you have multiple homes set up, tap Home Settings, then tap a home. Look under Hubs & Bridges to see if your home hub is connected.
- On your Mac: Go to Edit > Edit Home. Then look under Home Hubs to see if your home hub is connected. To check the status of a home hub in a different home that's set up in the Home app, tap Homes in the upper-left corner, then click a home.
- On your Apple TV: Go to Settings, then click AirPlay > Room and make sure that you assign your Apple TV to a room in the Home app.
If you have multiple home hubs set up, the primary home hub will show as connected. The other home hubs will show Standby as their status and will take over remote access if the main home hub is disconnected.
Do more with the Home app
Published Date: October 19, 2019