Once the Workflow object (Change Item) has been launched:

As Creator

Go to Part/CAD Document from which the Workflow has been launched, then go to the "Workflow" section of the Part/CAD Document Profile Card and click on the link of the corresponding Workflow.

As reviewer

Go to "My Innovator" in the Table of Content, when in "My InBasket". The sought Workflow will be displayed in the table.