What if the Wizarding World of England in Harry Potter had a Royal Family?

In this story, the Witch Heiress and Wizard Heir were kidnapped as babies and raised in America for 9 years, she recently discovered the Truth but by the time she found out her parents were dead leaving her to rule Wizarding England, Australia, and Canada as in the real world England rules all of those countries, if you want to know how she does read to find out...