With double tap, you can interact with your Apple Watch when your other hand is busy
https://techcrunch.com/2023/09/12/with-double-tap-you-can-interact-with-your-apple-watch-when-your-other-hand-is-busy/
Apple just introduced the Apple Watch Series 9 at an event in Cupertino. It’s a faster, more capable smartwatch. But the company is also using this new device to introduce a new gesture called ‘double tap’.
If you’re wearing your Apple Watch on your left wrist and holding something in your right hand, it can be difficult to interact with your watch. Some people even use their nose to tap on the screen.