This is something that’s been frustrating me for a long time, not sure why it took me so long to request it.
When I see the slide-in notification on my Mac or iPhone and click/tap it, the red Notification dot remains on the Notifications bell icon (and consequently, the app icon) until I click the Notifications icon to “see” the thing that I’ve already seen. Not the best UX here — if I’ve clicked on and viewed the thing that it’s alerting me to, then… well, I’ve seen it, no more red dot needed! The current process is actually having us click two unnecessary times: once to view Notifications and another to exit Notifications. Can you look at making the red dot usage a bit smarter?