How to only share individual HomeKit devices/ rooms?

Hey there HomeKitAppleHome,

Thanks for reaching out to the Apple Support Communities. To get started, while it wouldn't be possible to allow users to access individual rooms set up in the Home app, you can set up and edit certain permissions for users using the steps below:

Allow remote access and edit permissions for users

If you set up a home hub, you can manage remote access and edit permissions for people that you invite to control your home. If you don't have a home hub set up, they can only control your accessories while they're at your home, connected to your home Wi-Fi network, and within range of your accessories.

To manage remote access and change permissions for a user, open the Home app and follow these steps. 

1. Tap or click the More button , then select Home Settings. If you have multiple homes, choose a home, then select Home Settings. 

2. Under People, select the person that you want to edit permissions for, then choose the following:

- Control Accessories Remotely: Turn on to allow users to control your accessories from any location. Turn off to allow users to only control your accessories while they're at your home.

- Add and Edit Accessories: Turn on to allow users to add and remove accessories, scenes, automations, and other users.

3. Tap or click Back, then Done.

Shared users can't add HomePod, Apple TV, or any AirPlay 2-compatible smart TVs or speakers to the Home app. You can only add these devices if you're the owner of the home in the Home app.

You can also leave feedback about changes you'd like to see to the Home app, at this link here: Product Feedback - Apple

While Apple does review all the feedback that is submitted, they would be unable to reach out about submissions.

We hope that's able to help.

Have a great day!