Honestly, I have no idea. The outcome for Carl could go either way. Maybe there are hints or foreshadowing in the recent comic issues, but I haven't kept up with them to know for sure.
In some fanfictions, Harry Potter realizing he is gay can be a powerful exploration of self - discovery. It might show his journey of coming to terms with his identity in a wizarding world that may or may not be accepting. For example, he could struggle with how his friends, like Ron and Hermione, would react. It also gives an opportunity to rewrite parts of the original story from a new perspective, adding more depth to his character.