It is. The movie takes elements from the true experiences of J.M. Barrie and his interactions with the Llewelyn Davies boys, and weaves them into a fictionalized but largely based-on-reality narrative.
The true story behind 'Finding Neverland' is about J.M. Barrie. He was a playwright who became friends with a family. The mother was a widow with four boys. Barrie found inspiration from his interactions with the boys and their make - believe games. This led to the creation of the story of Peter Pan.
The real - life story influenced the movie in many ways. For example, the relationships between J.M. Barrie and the family members were replicated in the movie. The emotions, like the bond between Barrie and the boys, were real and translated well on screen. Also, the setting and the simple yet magical moments from the true story were used to create the movie's atmosphere.
Definitely not. The Promised Neverland is purely a work of fiction. It was crafted to entertain and tell a unique and imaginative tale, not based on real events or people.