Once a workflow like "review and approve" is completed, there is nothing about it a user can show (who approved, when, comments, …). Is it possible to get the workflow history related to a document?
You can see the list of finished workflows when you follow the "tasks" URL (/share/page/my-tasks). Then, when you open a finished workflow, you can click the "Workflow-Details" Link (URL /share/page/task-details?taskId=…). There you can see who approved or rejected the document.
