Yes, there might be such fanfiction in the vast world of fan - created works. Fanfiction often explores unique and sometimes out - of - the - ordinary scenarios. However, this particular concept seems rather unconventional and might not be as common as more traditional fanfiction themes within the Harry Potter fandom.
Harry might be initially in shock. He can't believe Ginny would leave him and their child. He could become withdrawn, not really knowing how to deal with this new situation.
Yes, there are some out there. You can try searching on fanfiction - specific websites like Archive of Our Own. Just be sure to read the tags and summaries carefully to find one that suits your taste.
One possibility is that Harry discovers some dark secret about Severus that makes him feel he can no longer stay in the same place as him. For example, if he finds out Severus had a hand in some past event that endangered his friends. So he decides to leave to protect himself and those he cares about.
Voldemort's remaining followers could be the antagonists. Even though Voldemort is gone, there are still some Death Eaters who are bitter about their loss. They might see Harry leaving with Fleur as an opportunity to get revenge on Harry or to use Fleur as a hostage to gain power. They could try to ambush them on their journey, creating a lot of dangerous situations for Harry and Fleur.
It could be that they leave to attend a special magical training that is only available in a very secluded place. They might have received an invitation from a very powerful and reclusive wizard. This training could enhance their magical abilities in ways that Hogwarts or Beauxbatons couldn't. They see this as an opportunity to become stronger and more self - reliant, so they leave together, excited for the new challenges and knowledge that awaits them.
One reason could be that the official Harry Potter canon is so extensive and detailed that it overshadows fanfiction. The original story has such a rich world, characters, and plotlines that it becomes the main focus for many fans, leaving less room for fan - created stories.
Well, Harry leaving for America in fanfiction could lead to him trying to adapt to a new culture. He might struggle with the differences in magic use between the two countries. For example, the way spells are pronounced or the types of potions that are popular. He could also get involved in some sort of mystery that is unique to the American wizarding community.
Well, one possibility could be that Harry discovers a magical portal that leads to another planet. He leaves Earth because he's on a quest to find a powerful magical artifact that is said to be hidden in a far - off galaxy. Once he leaves, he has to deal with all kinds of strange new creatures and different forms of magic.
There's a fanfic called 'Farewell, Britain'. Here, fem Harry leaves Britain because she feels that she can no longer tolerate the false accusations and the dangerous situations she's constantly in. She heads to America where she discovers a whole new world of magic. It's full of adventure as she meets new friends and foes alike. It also explores her growth as a person outside the familiar British magical world.