I feel the need to give my opinion on something but I'm fairly sure it will be an unpopular one.
I think a character that explores their sexuality or gender identity in fiction but resolves to identify as heterosexual or cis is not inherently bad or queerphobic (of course, an individual instance still could be).
Obviously, more LGBTQ rep (as well as other marginalised groups) in media is very good and we should strive for it, but... 1/x
I think we need to also work to normalise the act of questioning regardless of result. I think that will both help queer people realise their identity sooner and help further acceptance from cishet folx.
If someone (especially a queer writer, but any writer without ill-intent) writes a char arc where they explore gender or sexuality, and the story does not frame it as a bad thing, then it isn't a problem if that character does not end up being queer.
Ash Lily