Is there a report or screen or API available to check which user acknowledged a message?

I have been playing with the new affordable Trmnl e-ink dashboard (https://usetrmnl.com). Having a Pushover dashboard app would be a great for businesses.

On IOS messaging apps have the capability of setting a custom icon.

Pushover should do this aswell instead of putting the custom icon in the other corner, very small and not easily noticeable.

Take a look at the image. We could have the custom image on big, and the pushover app icon on small!