How is Hikaru Sulu's daughter related to him, in both the old and new timelines? Adopted? Surrogate? Gene spliced or other technological means? From an older relationship?
The official answer is, there is no official answer.
The biological relationship between Sulu and his daughter Demora is not specifically mentioned in either old or new timeline (although it is addressed in the non-canon old-timeline novel The Captain's Daughter as the result of a one-night-stand)