LGBTQIA+ has nothing to do with gender identifications other than those with gender in the name.
The B in LGBTQIA+ means bisexual, or the attraction towards both binary genders. It does not say that there are only two genders. There are other genders, such as they/them or it/its.
There is a sexuality known as pansexual or, rarely, omnisexual, which means you feel attraction towards anyone, regardless of gender identity.
People can identify as anything, commonly known as xenogenders, and you cannot do anything to convince me otherwise.