Yes, it could have. Fanfiction often takes existing universes and expands or reimagines them. Harry Potter has so many elements that could potentially be the work of a fan. For example, the magical world with its unique creatures, spells, and Hogwarts as a school. If J.K. Rowling wasn't the original creator but was building on someone else's initial ideas about a magical school and a boy wizard, it would be fanfiction. However, she is the original creator, but the conceptually it has elements that could be seen in a fan - created work.
If Harry Potter was an American, then the chances of success of the Harry Potter novel would be different. Since the background and characters of the novel were fictional, they were not restricted by the author's nationality.
However, considering that Harry Potter's author, JK Rowling, was a British author, it would also affect the novel's global influence. The United States was a place with a rich cultural and literary tradition. The story of Harry Potter had a great influence in the United States. In addition, due to the language and cultural differences between the United States and the United Kingdom, if the Harry Potter story was written in English, it might have a greater impact in the United States than in other countries.
Although the Harry Potter story was not restricted by the author's nationality, considering the cultural and literary traditions of the United States and the differences in language and culture between the United States and the United Kingdom, the influence of the Harry Potter story in the United States might be greater than in other regions.
There were seven books in the non-Harry Potter series, which were Harry Potter and the Sorcerer's Stone, Harry Potter and the Chamber of Secrets, Harry Potter and the Prisoner of Azkaban, Harry Potter and the Goblet of Fire, Harry Potter and the Order of the Phoenix, Harry Potter and the Half-Blood Prince, and Harry Potter and the Deathly Hallows.
The film series included seven Harry Potter films: Harry Potter and the Sorcerer's Stone, Harry Potter and the Chamber of Secrets, Harry Potter and the Prisoner of Azkaban, Harry Potter and the Goblet of Fire, Harry Potter and the Order of the Phoenix, Harry Potter and the Half-Blood Prince, and Harry Potter and the Deathly Hallows.
Harry Potter and the Deathly Hallows had already been released, and Harry Potter and the Half-Blood Prince was currently in theaters.
A total of seven Harry Potter novels have been written. The series includes 'Harry Potter and the Philosopher's Stone', 'Harry Potter and the Chamber of Secrets', 'Harry Potter and the Prisoner of Azkaban', 'Harry Potter and the Goblet of Fire', 'Harry Potter and the Order of the Phoenix', 'Harry Potter and the Half-Blood Prince', and 'Harry Potter and the Deathly Hallows'.