Windows 11 still uses old Bluetooth codecs that reduce audio quality to enable microphone use, but there's a fix.

In Windows 11/10, the default audio output device is the device that Windows uses to play sound – this can be speakers, headphones, Bluetooth headset, or other audio devices connected or built-in to ...

If you are hearing yourself on Mic via a playback device, it does not mean your microphone, speaker, headset, or system has malfunctioned. To fix this, you have to change the Sound Control Panel ...