リモートによる通知設定は iPhone/iPad/iPod Touch のみの機能です。
Remote notifications are sent by an application's remote server (its provider) to Apple Push Notification service
which pushes the notification to devices on which the application is installed.
って送信されることになります。
The iOS Notification Services API is deprecated and will be removed in a future version of Unity. Please consider using the the "Mobile Notifications" package (available in the Unity package manager) which implements the iOS UserNotifications framework.