How to use Phone as a Speaker for PC

You can use a phone as a speaker and microphone for a Windows 11/10 PC with a free app called AudioRelay. Learn how to set it up!
MacRumors

Use Your iPhone as a Microphone for Your Mac

If you have macOS 13 or later installed on your Mac, you can use a nearby iPhone as your computer's microphone input. Keep reading to learn how it works. When Apple released macOS Ventura in October ...