In Agile, the Definition of Done (DoD) typically requires that the feature be both developed and fully integrated into the release package before it is considered complete. Even though the feature was successfully tested and demonstrated by QA, if it is not included in the release package, it is not technically completed according to the DoD. Therefore, its story points should not be added to the burndown chart until it is actually part of the release. This ensures that the team's progress is accurately tracked based on completed, released work.

In this situation, the scrum master has already escalated the issue to upper management without resolution, so it's important to collect empirical data to further demonstrate the impact of the external dependency. This data can be used to show the consequences of the dependency on the project's progress, helping upper management understand the severity of the issue. By influencing management and making them accountable for ensuring the external team delivers, the scrum master helps ensure the problem is addressed at a higher level, which is critical for long-term resolution.