When export Iteration status page, no data for Portfolio item in Parent column.
From the Iteration status page. The Portfolio item info could be shown in parent column for the user story which associated PI.
Then export the Iteration status page as CSV, the Portfolio item info could not show in Parent column.
This is a known issue, This is not a defect. "Parent" is a field that can only point to other user stories. "Feature" points to portfolio items. They are separate fields in our app and only the parent chooser squashes them into a single field.
When you export the page, you need to add the Feature column to the page to export.