https://wccftech.com/future-apple-watch-models-might-feature-a-hidden-camera-and-flash-under-the-display/

Apple release the latest iteration of the Apple Watch a few months back and added another major health feature. Along with the Apple Watch Series 6 announcement, Apple also announced its new Fitness+ workout service. However, Apple is not shy when it comes to experimenting and adding new features to its wearable. Seemingly, a new Apple patent has been filed that shares details on an under-display camera for the Apple Watch.

As mentioned earlier, Apple has filed a new patent with USPTO that allows for a hidden camera under the display of the Apple Watch that comes with a flash. The interesting thing about the approach is that the camera and flash will only appear when they are in use. What this means is that the camera hardware will remain hidden under the display until or unless you turn it on.