iOS 26.3 adds a new "Notification Forwarding" setting that allows incoming notifications on an iPhone to be forwarded to a third-party device. The setting is located in the Notification section of the Settings app under a new "Notification Forwarding" option. Apple says that notifications can only be forwarded to a single device at a time, so if Notification Forwarding is enabled with a third-party wearable, the Apple Watch won't able to receive and display notifications.