One popular 'Harry Leaves Britain' fanfic could be about him traveling to a far - off magical land to study new kinds of magic. For example, he might go to a hidden school in the Amazon rainforest where magic is intertwined with nature in ways he's never seen before.
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.
One possible plotline could be Harry leaving Britain to explore the magical communities in other countries like France or America. He might discover new spells or magical creatures there.
Voldemort or his followers could also be relevant in some stories. Maybe Harry is leaving because he fears a resurgence of Voldemort's forces and wants to find a way to defeat them from afar. Or perhaps some of Voldemort's old followers are still after him, and his leaving is a way to draw them away from the innocent people in Britain.
There's 'The Journey of Fem Harry Away from Britain'. In it, Fem Harry decides to leave Britain as she believes she can't grow and fight Voldemort effectively in the environment she's in. She may encounter new allies and enemies on her journey away from Britain. Maybe she meets some foreign wizards who have different ways of magic that could help her in her fight against Voldemort. And then there's 'Fem Harry's Departure'. This fanfic could explore how her leaving Britain is a strategic move to draw Voldemort out of his comfort zone and into a new battlefield.
They might write such fanfics to give Harry a new adventure. After all the events in the original books, his story doesn't have to end in Britain. It's a way to expand on his character and see how he would react in different situations outside his familiar homeland.
One common theme is self - discovery. When fem Harry leaves Britain, she often has to figure out who she is outside of the expectations and restrictions of the British wizarding world. For example, in many stories, she realizes she has different magical abilities or interests that were suppressed in Britain.
He could meet other famous wizards from different countries. For example, he might run into Nicolas Flamel, who has been traveling around the world. Flamel could share with Harry some of his vast knowledge of alchemy and magic that has been passed down through the ages. This encounter could give Harry new insights into magic and its potential uses.
One interesting scenario could be Harry Potter starting a new life in the Muggle world and using his magical skills in secret to help people. For example, he might use magic to heal the sick in a Muggle hospital without them knowing. Another could be him exploring different magical cultures outside of Britain, like those in Asia or Africa that are not much explored in the original books. He could learn new spells and magical techniques and bring them back to the wizarding world in the future.
The theme of breaking free from expectations is quite common. In Magical Britain, Harry has so many expectations placed on him because of his status as 'The Boy Who Lived'. When he leaves, he can be his own person and not be defined by those labels. Also, the exploration of different magical cultures is a big theme. He gets to see how magic is practiced in other parts of the world, which is really fascinating.