Microphones in your Mac mini are COMPLETELY different hardware spec and design than what's in your iPhone. Nice attempt though.For FaceTime in a large room, an iPhone microphone located at the screen won't be powerful enough. Hopefully there is support for additional microphones using other Apple devices.
Edit: For those who disagree, I use a Mac mini right now with that setup, so I know it required me to buy more microphones before people can be heard.
But still
Apple damnit!!!
Why cannot Apple TV+ app on existing Smart TV's and competing Smart devices like the Roku allow for AirPlay of sound and video from a Mac, iPhone, iPod, and iPad?!
There is no technical reason NOT allow this! And to continue forcing these massive Apple TV products.