This.
That's not really the case anymore. The movie establishes that Sarada just follows him whenever he is doing anything.She was staking Boruto in Manga 700 just like the Novel and Manga 700 is Canon, so we have evidence that Sarada is a stacker.
She does it quite a lot when he is training as well, even when he is walking home from a mission. So yeah..
It goes somewhat near canon but that's true.Chapter 2 proves that the novel isn't completely canon or accurate if you will.
I'm actually glad that Boruto has the three elements but the novel is sus.