Does ObjectCaptureSession.startDetecting() output BoundingBox properties

I was able to run Scanning objects using Object Capture, and get the bounding box after tapping "Continue" button.

1. Does the code output BoundingBox properties as well? For example, the vertex of all corners of the bounding box?

2. In the Apple document, If success, the session state will eventually transition to .detecting and switch to the bounding box selection mode UI, what UI? Anyone has link so I can look into?

Thanks!