This works for Project “DB”. Thank you. Now I need to find a way to generalize this for all projects. do you know a way to get the “key” for the current issue?
You were going in the right direction with iterating. In this case, if you do not use Issue or Blocked by issues in rows, you need to iterate through both dimensions, because properties from both are used, and properties are available only on issue level.
However, this would be a very slow calculation.
Instead, I suggest creating a new JavaScript calculated custom field “Blocked by from another project” where you import only linked blocker issues from other projects (for instance, checking in the project keys of linked issues).
One example how to import all links: All Links