Hi Gayle thanks for posting in the Lucidspark Community! A few templates come to mind for me that could be modified to show both completed and future work. First the "Planning template" which has dates for sprints and an overview of program milestones:

Second "Roadmap" which utilizes Lucidspark's Timeline tool to show tasks on their corresponding dates including customizable milestones and a real-time progress bar:

Both of these are available within the Lucidspark template gallery by searching "sprint planning" and "roadmap" respectively.  

Looking forward to suggestions from the rest of the Community!