How notifications behave depends on the status of your devices and your settings. With Wrist Detection enabled, in order to bring notifications to your attention as soon as possible:
- If your iPhone is unlocked, then you will receive notification alerts on your iPhone instead of on your Apple Watch.
- If your iPhone is locked or asleep and your Apple Watch is unlocked (regardless of whether the watch display is asleep or awake) and on your wrist, you will receive notification alerts on your watch.
- If your Apple Watch is locked or has Do Not Disturb enabled, then notifications will go to your iPhone.
- Alerts for incoming phone calls are delivered to both devices.
If you turn off Wrist Detection (on your iPhone, in the Watch app, go to: My Watch > Passcode - turn off Wrist Detection), then all notification alerts will be delivered to both devices.
However, you will then not be able to benefit from features including earning Stand credit and a single unlock after placing your Apple Watch on your wrist.
If you would like to submit a feature request to Apple for a settings option that enables notifications to be delivered to both devices irrespective of other settings, then you can do so here: