Many of the British Lords often thought that Harry, being young and newer to the Wizarding World, should bow to their whims and follow along. Each time a Lord or Lady tried to belittle Harry in the Wizengamot, Harry just reminded them every time through his stubbornness, well thought out responses, and flare of power just why he was accepted as Lord of two powerful Houses and why he won the war. Sure he had inherited both lordships, but family magics also had to approve of the heir and the heir becoming Lord. There are instances where family magics haven’t approved of the next Lord or Lady, from mild refusals with a mild burn to more... permanent... responses with the person losing their hand or their life in the case of one contentious German lordship that ended up with the youngest daughter instead of the oldest, problematic son. Both the Potter and Black family magics had approved of Harry right off, and luckily for Tony his family magics had accepted him when his grandfather had taken him into the family vault to proclaim him as Heir. As long as he didn’t screw anything up in the eyes of his ancestors, he would have little issue claiming the Lordship when the time came.