What makes you think they are copying "from" Apple? Why not "from" the Essential phone? Just curious how you arrive at the conclusion.
I still wouldn't call Essential's a notch. Maybe a nook, a cranny. Either way, it's the same effect as all of the other android phones' notches. It only houses a camera and sensors. There's no extra security because of it.
I will say though, that good lord the Essential is a beautiful phone.