As someone who made the mistake of putting a webcam cover over the tiny little microphone hole above the screen (it picks up very little besides impact noises now), it wouldn't be hard to have a mic hole facing in both directions to solve that problem
A single mic facing in both directions, or one mic next to the other but facing opposite directions, doesn't really help. You need separation between them in the direction of wave propagation (so in the front-back dimension of the laptop screen in this example) to tell which direction the sound is coming from.