A lost iPhone is just a tap away when you've paired it with an Apple Watch. This article explains how to activate a sound on your iPhone from an Apple Watch, and what steps to take if that doesn't work properly.
How to Ping an iPhone from an Apple Watch! (2023)
The ability to ping a lost or misplaced iPhone from Apple Watch depends on one very important factor: proximity. This feature only works if your iPhone and Apple Watch are within Bluetooth range (usually a few dozen feet) or connected to the same Wi-Fi network.
If you’ve lost your iPhone somewhere other than where you are now, the tip at the end of this article may help. But if you think your iPhone is nearby, use these instructions to ping it from your Apple Watch:
Swipe up on the face of your Apple Watch to open the Control Center.