I don't think so. Nina Nesbitt is busy with her music, like touring and releasing albums. Pulp Fiction is a movie that exists in the movie - making and movie - loving community. Their areas of activity don't seem to cross paths. For example, Nina Nesbitt is likely to be associated with music festivals and radio play, not with a movie like Pulp Fiction that has a different fan base and cultural context.
There's no indication that Nina Nesbitt has had any involvement with Pulp Fiction. Nina Nesbitt is engaged in the music industry, creating and promoting her music. Pulp Fiction is a cinematic masterpiece with its own set of related cultural products like soundtracks, but these don't seem to have any connection to Nina Nesbitt's music. It's like they exist in two completely different universes within the broader entertainment world.
No. There's no evidence to suggest that Nina Nesbitt has been involved with anything related to Pulp Fiction. Her work mainly focuses on her music career, such as writing and performing her own songs, while Pulp Fiction is a movie with its own separate world of filmmaking and pop - culture influence.