It appears as though you click on each button and see what color the button turns. If the button turns red the site doesn’t have the permission to do what the button says. If the button turns green then the site can do what the button says.
Because if I was a developer doing development, I'd test browsers with what I developed.
Was also interesting to see webauthn ask if I wanted to allow a site to use faceid which I didn’t know was even possible