Thanks for that info and choosing the Apple Support Communities. It sounds like you want to setup your iPad as a home hub and are having an issue. To help with this situation, please follow these steps to make sure your have followed the correct steps to setup your iPad as a home hub, and then these troubleshooting steps from this Apple resource on your issue.
Set up iPad as a home hub
- If you’re using iOS 10.3 or later, go to Settings > [your name] > iCloud. If you're using iOS 10.2 or earlier, go to Settings > iCloud.
- Sign in with your Apple ID.
- Check that iCloud Keychain and Home are both turned on.
- Go to Settings > Home and turn on Use this iPad as a Home Hub. Need help?
Get help with your home hub
If you have issues creating automations or controlling your HomeKit accessories when you're not home, follow these steps:
- Make sure that your HomePod, Apple TV, or iPad is:
- Connected to the Internet and on the same Wi-Fi network as your other iOS devices during set up
- Updated with the latest version of tvOS or iOS
- Signed in to iCloud with the same Apple ID with two-factor authentication enabled
- Make sure that you can control your accessories in the Home app on your iOS device. Open the Home app and turn on a light or change the temperature.
- Make sure that your device is set up as a home hub:
- For HomePod, open the Home app on your iOS device, tap , then check under Home Hubs to see if HomePod is connected.
- On your Apple TV, go to Settings > Accounts > iCloud and make sure that your Apple TV shows HomeKit as Connected. If you don’t see HomeKit, then your Apple TV isn't connected as a home hub.
- On your iPad, go to Settings > Home and make sure that Use this iPad as a Home Hub is turned on.
- Restart your Apple TV, iPad, and iPhone.
- Wait a few minutes. If you still need help, sign out of iCloud on your Apple TV, then sign back in. Go to Settings > Accounts > iCloud.
Automate and remotely access your HomeKit accessories - Apple Support
Use the Home app on your iPhone, iPad, and iPod touch - Apple Support
Cheers!