Here's a step-by-step walkthrough on how to view past sprints in Jira
1. In your Scrum project, click on "Reports."

2. Select the "Sprint burndown chart" from the reports options.

3. This section shows you the scope changes.

4. This section shows the incomplete work items.

5. This section shows all the completed work items.

6. This section shows the work items completed outside of the sprint.

Congrats! You have successfully viewed past sprints in Jira!