Currently both pop-up notification types are displayed on top of the status bar.
The not dismissible bar-style system notifications (Unplug charger, Android App support needs to be started, e.g.) are hiding the status bar completely.
As a long time user i daily have the occasion that i want to peek at the battery percentage after unplugging the charger but that info is hidden by the notification.
The App- and general purpose notifications in dismissible bubble style are less annoying in that sense but still, often i want to see info from the status-bar and first need to dismiss a notification that blocks the view.
This makes a split second peek into an “aargh, i need to swipe the annoyance away first” experience.
My proposal for the floating dismissible notifications would be to move them to the bottom of the screen.
Another advantage from moving those down would be to have them closer to the thumb and thus not needing to reach to top of the screen to swipe/dismiss them.
If moving them to the bottom is not doable or to radical change somehow, please consider to place the notifications with a spacing to top so the status-bar remains visible at any time.
For the system notifications imho it would be great if that black bar would push the status-bar and whole page content down, not overlaying it.
Mockup attached to indicate behaviour