This was discovered by a trusted Windows 11 insider@PhantomOfEarthand revealed on X (formerly Twitter).
However, this is expected to change with Windows 11 Build 26120.1542.
To use either of these features, you must enable them.

This will open a new window on the screen, allowing you to switch on the multi-app camera streaming.
Toggling on the Multi-app Camera feature will allow multiple video apps to reach the default camera simultaneously.
However, this feature has certain limitations.

We can expect to hear more about them in the upcoming Windows 11 preview builds.
