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Hello KaranHOC,

Thank you for reaching out to Apple Support Communities.

You can add a second Home in HomeKit but you will need another hub since Hubs are designed to stay within one home.

These steps should help:

"Set up Apple TV as a home hub

Apple TV* automatically becomes a home hub when you add it to HomeKit.

1. Open Settings on Apple TV.
2. Select Users and Accounts. Make sure your name is selected under Default User and that you're signed in to iCloud with the Apple ID that you used to set up your HomeKit and Matter accessories in the Home app.
3. Go back to Apple TV Settings, then select AirPlay and HomeKit.
4. Scroll down and select Room, then choose a room or add a new room.

Set up iPad as a home hub

1. Tap Settings > [your name] and make sure that you're signed in to iCloud with the Apple ID that you used to set up your HomeKit and Matter accessories in the Home app.
2. Tap iCloud, then scroll down and check that Home is turned on under Apps Using iCloud.
3. Tap Settings > Home and turn on Use this iPad as a Home Hub.

To use your iPad as a home hub, it must remain in your home, powered on, and connected to your home Wi-Fi network."

Additional details can be found here: Set up your HomePod, HomePod mini, Apple TV, or iPad as a home hub

Hopefully this helps.

Cheers!