Well, the occurrence of a timeskip in a manga can be quite unpredictable. It usually happens when the author wants to introduce significant changes in the story or characters' situations. But without specifying the manga, it's impossible to give a precise answer.
It could also be related to a prophecy or a pre - determined fate in the fanfic's plot. There might be some kind of dark prophecy that says Kawaki has to kill Naruto to prevent a greater evil. Or perhaps Kawaki is being controlled by an external force that has a vendetta against Naruto and uses Kawaki as a tool to carry out the murder.
I really like 'The Early Days of Hinata'. This fanfic shows Hinata's life before the time - skip. It includes her interactions with her family, especially her father, and how she starts to find her own strength. It's a heartwarming read that gives a lot of insight into her pre - timeskip self.
Sure, the Boruto timeskip has taken place in the manga. It marks a notable shift in the storyline, introducing new elements and evolving the characters' growth and relationships.
Sure did. The timeskip in Boruto manga shifted the focus and introduced new plot developments. It also aged up the characters and gave the story a fresh direction.