Write on a board or make a doc on your top 6-8 programs you have delivered. Write the high level summary, metrics, impact etc and then practice STAR format for all the usual behavioral questions(successful project, failure, leadership disagreement etc) and you should be good. Your answers should incorporate the leadership principles. If they are asking you repeated clarifying questions then they are looking for a leadership signal, so over index on that principle once you get the hint. HR round will only gloss over high level details and won’t ask detailed scenario based questions. Good luck.