Ask HN: Using MacBook as Bluetooth Headset

I want to create a virtual Bluetooth headset on Mac.

Smartphone will connect to this blueooth headset.

Then I want to use Bluetooth headsets input and output as virtual sound input / output device to modify the sound in real-time using Audacity realtime plugins and other softwares.

Is this possible? If any such software exists please let me know.

I realize this is easier to do with microphone/headphone jack but new MacBook don't have these jacks but they've Bluetooth