How to get the time of when the Metal is closed?

I am creating content where there is a Metal Volume and a Bounded Volume.
When I close the Metal Volume from the Control Center, the Bounded Volume remains and I want to close it, but I cannot get the time of when the Metal Volume was closed.
Is it possible to get the time of when the Metal Volume was closed?

VolumeCamera.WindowStateChanged does not fire and VolumeCamera.WindowOpen always returns false.