Queen Elizabeth II (with great help from Prince Philip) helped the monarchy reconstruct itself to remain relevant to the modern era compared to parliament that let the Empire slip away, failed to re organise after WW2 to build a better alliance and fell into obscurity (just compare approval polls between the UK government and monarchy)

I suspect rather than being active in anything, she was more smart in knowing how to play the game and keeping everyone not directly in the family at arms length but close enough they felt a connection that if she met them at an event it was a happy surprise.