NotchCam offers a quick cam preview when you click behind the notch.
Other features include
Ability to simulate the notch on other devices. The notch is size accurate to the new MBP, so that means it will adapt to any resolution.
Ability to blend or make the notch disappear by adding a black bar to the existing wallpaper. Make sure the existing wallpaper is located in the Pictures folder.
Multiple display support
Restore original wallpaper to the respective display.