Yes, there might be. The world of fanfiction is vast and full of creative crossovers. Fans often like to combine different fictional universes to create unique and interesting stories. So it's very likely that someone has written a fanfiction where Harry Potter has Wolverine claws.
The origin of Wolverine's claws in the comics is tied to his mutant genetics. It's an inherent ability that manifests when he wants to use them for protection or combat.
Wolverine's claws can come back due to a combination of factors like his mutant abilities reaching a new peak or a scientific experiment gone right. Different comics offer different explanations for this.
Wolverine's claws come back in the comics because of his inherent mutant physiology. His healing factor works to repair and regrow them. Sometimes, specific story arcs introduce elements that facilitate or accelerate this process.
Well, it could be really cool. Harry could use the claws in duels, adding a physical and dangerous element to his magical battles. Maybe he'd be able to combine spells with his claw attacks for a more powerful offense.
Well, it happened through a complex series of events and encounters. Sometimes it was due to advanced technology or a special intervention by other characters.