Get Timesheet Profile Approver from Fusion/API
In Workfront when you click on a timesheet profile, there is a setting for who becomes the approver for any generated timesheets.

This field is not available on the timesheet profile TSPRO object. I have looked through many other objects and cannot find where this field is available over the API.
How can one query this field from Fusion or over the API?
Ultimately I need this field for generating timesheets in a special way using Fusion.