Gen Z likely has a much more loose definition of sexuality and gender identity than the older generations have. The more loose the definition, the more people that can identify as part of the group.

Understanding gender and sexuality as fluid and as part of a spectrum is a difficult thing to learn when you've been taught the exact opposite your whole life. And Gen Z isn't old enough to be stuck in those definitions. Love it or hate it (and I do hate social media for many reasons), social media has been the catalyst for so much LGBT+ acceptance.