Right. So that seems to be available in iOS. Unless we are talking about something else.
The top bar of the Apple Watch has a red dot saying there is a notification. Tap on that and see all notifications and are able to acknowledge and clear all.
On the iPhone if you have multiple pages of apps and customized reasons for having a badge you will not be able to tell if there is a notification worth acknowledging unless you open each app.
So that exact style of notification doesn't exist on iPads/iPhones unless you consider badges on individual apps the same thing a as an icon at the top of your phone/tablet stating there is a notification to address similar to android.