StandBy is a new iPhone feature that could be great for Apple Home users - The Verge

... acting like a smart speaker; you can ask Siri to play music as you would on a HomePod, and in StandBy, the phone will show visual results when ...

source https://www.theverge.com/2023/6/5/23739121/apple-ios17-standby-apple-home-smart-display-wwdc-2023