Interesting. But if I understand dynamic island or the intended future of it correctly, it isn’t a Notification Center. Banners take care of that. It’s to be a small window for a running app to execute several small elements from that running app. Theoretically, an ad inside a running app could translate that add to dynamic island. Dynamic island Uber ‘in app’ scroll message: “your ride is” “4 mins away”, “Geico insurance” “can save you $$”’.
That is not a notification, that is an in app ad extended to, in effect, a tiny secondary display.