I'm seeing notifications as a feature fail on my android phone too. Apparently there is simply no reliable way to get a notification at a particular time (e.g from a todo app) anymore. ON A PHONE. THE THING DESIGNED TO BEEP/RING/NOTIFY YOU OF THINGS.

Because of all the junk they've added re: battery optimization, "Adaptive AI" notifications. Even after disabling much of that, it takes a 3rd party app to get notifications reliably.