The fact that Elsa had no romantic implications in the first movie meant that there was nothing implying that Elsa was actually straight, and therefore could turn out to be gay. However, IGN asked Frozen II songwriter Kristen Anderson-Lopez what she thought of the fandom that was interested in seeing this, and she made it clear that the sequel will follow what the first movie started, by not focusing on Elsa’s romantic life at all. According to Anderson-Lopez…
Article source: https://www.cinemablend.com/news/2478651/no-frozen-ii-wont-give-elsa-a-love-interest