Not wrong, as in morally wrong -- but it is definitely wrong from a biological standpoint. It a birth defect. Just as intersex conditions are. It is unnatural. It means that something went wrong in the natural, normal process and the result was a biological mistake.
Now, that doesn't mean that people with down's syndrome or intersex conditions don't have worth or can't love or be loved -- but I don't really know why we have to pretend that they aren't birth defects. People are born without limbs all the time, but we don't go around saying that the number of limbs a person has falls on a spectrum and it is perfectly normal to have any number of limbs. Nope. It is normal to have 2 arms and 2 legs. Any other combination is the wrong outcome if you are hoping to have a normal, healthy body. You can make the best of what you've got if you are born with birth defects -- but you don't get to rewrite what is normal to make yourself feel better.
Sexual orientation: 3 options. Heterosexual -- you like the opposite sex. This is what the majority of people are. Homosexual -- you like the same sex. People are wired a little differently and are born liking the same sex. It's no big deal. Bi-sexual -- some people like both the opposite sex and the same sex. There are no other options besides these. Everything else you see online is just a bunch of made up stuff that doesn't even make sense. Science tells us how biology works -- not social media. You can ignore it.
Gender: There are only 2 genders because there are only 2 sexes: male and female. It is okay if a boy likes "girly things" or a girl likes "boyish things" -- but that doesn't mean that they are born in the wrong body. You cannot change your sex. You can dress or act however you want because gender "rules" are just guidelines for how most people of a gender act, but you are free to bend or break those "rules" if you want to -- but you will always be the sex you were born as. All these other genders that you see online are just a bunch of made up stuff that doesn't even make sense. Science tells us how biology works -- not social media. You can ignore it.