I often manually switch to the built-in mic of my MBP [edit: while using Airpods for audio output]. To switch more quickly, I found that when you alt-click on "

I often manually switch to the built-in mic of my MBP [edit: while using Airpods for audio output]. To switch more quickly, I found that when you alt-click on "Sound" while in the Control Center, you can select audio devices for input and output independently of each other.