Since the UI 3.0 (Android 11) update, the edge colors no longer worker for my apps. Also, I do not have the power off icon (usually located near the settings button) when I pull down from the top of the screen.
For the power icon you need to pull the notifications twice and you should see it then. For edge lighting go to Settings->notifications-> tap on brief. then go to brief pop-up settings->edge lighting style.
Thanks! That worked for the power! Edge lighting still not working. The setting is right. But it's not working for apps. However, it does seem to work for some notifications.
in settings->notifications under brief make sure included apps is set to all apps. If the app sends a notification then it should work. also apps under silent notification may not work.