Twitter sharing lines confuse netizens.
In fact, this is the built-in Live Listen feature on the iPhone to turn AirPod into a close-range hearing enhancer for deaf people and it can't be used to spy like everyone thinks.
After turning on the Live Listen feature and directing the iPhone microphone towards the person you want to hear. Sound will be transmitted via Bluetooth to help deaf people hear what they say through hearing aids or AirPod.
This is a useful feature for those who need to hear better in a noisy environment.
To enable Live Listen on iPhone, you can refer to the article How to enable Live Listen mode on AirPods.
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