Identify Out-of-Plan Dependencies

As a plan owner, I would like to know about any stories within the scope of my plan which is marked as blocked by an issue outside of my plan because those blockers need to be resolved before my plan is accurate.

We have one project per team, and are further organized around either platform or application. Our application teams has milestones and releases and would like to use JIRA Portfolio to plan and manage them. However, many of their features are dependent on the development or fixing of underlying platform work, which would not appear on their plan.

It would be nice if Portfolio could do some scheduling or other logic around these "external" dependencies, but at the very least I need a report or list of the stories outside of my plan which are blocking stories within so that I can run them down, get timing, etc.

Additionally, it would be desired to list external issues that block external issues that are dependent on issues within the plan's scope. For example, an external issue blocks another external issue which blocks the Epic within the plan's scope. As of now, we can only go as far as being able to see the external issues that block issues within the planned scope, although not the external issues that block another external issue on which an issue within the plan's scope is dependent.