The film Slumberland isn’t an exact remake of the original Little Nemo comic (written and illustrated by Winsor McCay), but the basis of the story is the same. A young child dreams of a magical world called Slumberland, and has many adventures.
For the Netflix film, Nemo was gender-swapped and the added backstory with her father emphasized why Nemo felt the need to escape to a magical world far different than her dreary one, a reality where her father was no longer there for her.
Source: https://www.distractify.com/p/is-slumberland-a-remake-of-little-nemo