How do you implement push notifications in a MAUI app?

Integrate Firebase Cloud Messaging (Android) and APNs (iOS), typically via a service like Azure Notification Hubs or a plugin that unifies them. Register for a device token, send it to your backend, handle incoming messages per platform, and route taps to the right page via Shell. Request notification permission on iOS 13+/Android 13+.

// After obtaining the platform token
await _api.RegisterDeviceAsync(deviceToken, userId);
// On notification tap
await Shell.Current.GoToAsync($"//orders/details?id={payload.OrderId}");