no, the problem with the + side of the "LGBT+" is that they're mostly all bullshit labels made up by tumblr users that makes close to, if not, zero sense, demisexual being one of them.

the point of sexuality and sexual orientation labels is to bring across which sex you're attracted to, thereby distinguishing your dating pool. this is consistently seen with homosexual, heterosexual, bisexual and even asexual and the original definition of pansexual. whereas "demisexuality" is an outlier. there's nothing strange or unusual or "queer" about wanting an emotional bond, in fact it's quite natural. many non-demisexuals requires a strong emotional bond with someone before feeling sexual attraction as well. but they aren't demisexual, because demisexuality in and of itself, doesn't make sense and isn't even exclusive to the label.