having a gender that doesn't match your love is called gender dysphoria, it's not a very common and the majority of people who don't have gender dysphoria don't know anything about it and will tell you it's not real
generally any gender falls under identifying as female/male or something in between, although generally people who identify as in between are afraid/confused to transition fully to a different gender
you see a lot of people who identify as non-binary usually end up transitioning to a gender that does not match biologically with their love, however some people are non-binary and will never be comfortable identifying male or female and can go back and forth
generally if people start making up a bunch of different terms to identify as they are just trying to feel significant or interesting
most people with gender dysphoria are transgender, or haven't yet transitioned, but this doesn't account for all cases