How many characters do you have? Each characters who have their own arc (even minor) will add a considerable amount of page count to your story. If any of these arcs are similar to another, merge them into one character
Cut any worldbuilding that doesn’t play into the central story. They generally should be the flavoring to your plot, not a big chunk of the story.
Read through your plot and cut/condense any plot that doesn’t play a role in character development.
As the saying go, “If I had more time I’d write you a shorter letter.” If Ghibli can make a 2hr long movie with compelling plot, world, and character, you can too!