Subtask due dates & project highlight for subtasks

We use boards for our projects, with fixed tasks in each board and subtasks within them.
Is there a way of

  1. seeing a subtask due date in the Calendar and boards at “project-level”, if the main task doesn’t have a due date associated with it? This feature works at a “Team-level” but not at “project level” which seems strange.
  2. Is there a way to give subtasks the project highlight colour at Team level so we can see which subtasks are associated with wich projects?