copyIssueProjectsToPR does not work for Projects

[bagermen]

I guess copyIssueProjectsToPR works for Classic Projects but not for new Projects.

The query shows me my project:

projectItems(first: 1) {
  nodes {
    project {
      id
    }
  }
}

This one return empty results

projectCards {
  nodes {
    project {
      id
    }
  }
}

There should be at least a note for that in the documentation