Indicates whether Unity loaded and initialized the XR display subsystem.
This property is read-only. Its setter is obsolete and causes a compilation error. To start or stop XR at runtime, call Start or Stop on an XRDisplaySubsystem instance instead. In a project that uses the XR Plug-in Management package, manage the loader lifecycle through that package rather than calling these methods directly.
This property reports the loaded state, not the running state. It stays true after you stop the display subsystem, and becomes false only when Unity destroys that subsystem. To test whether XR is currently running, use XRSettings.isDeviceActive.