Hi @Kara_De_Nil,
Yes, you may analyze Sprint’s commitment and progress across several sprints from different boards and projects.
There is one example in the eazyBI Demo account that is an excellent starting point: Active (multiple) sprints story points burn-down - Issues - Jira Demo - eazyBI.
In this report, you can pick multiple boards and project from the page filter or hand-pick multiple sprints.
There is a related Community topic with a more advanced solution on grouping Sprints by custom properties (for example, cycles or trains).
Best,
Zane / support@eazyBI.com