The updated Home app in iOS 16 makes smart home control even easier with new automation suggestions and expanded controls in Control Center for quicker access to accessories and scenes.
For example, the Lights, Climate, Security, Speakers and TVs, and Water categories let you quickly access all the relevant accessories organized by room.
° Open the Home app to show the Home tab. Below your home’s name, buttons show the status of accessories belonging to a category—for example, a Lights category that shows “3 on.”
° Tap one of the category buttons to show all accessories within that category, organized by room.
° While viewing a category, tap the icon on the left side of an accessory tile to perform an action—turn a light or group of lights on or off, start playing music on a HomePod, or lock the front door.
(This how-to is based on my experiences and info on Apple’s support pages.)