What are cis and trans alternate types of? I don’t think it’s “gender identity” because wouldn’t that just be man, woman or nonbinary regardless of whether they’re cis or trans? Cis/trans just being a qualifier?
If the answer is “I am cis” or “I am trans”, what is the question?
Edit: Someone came up with the term “gender congruity” and (after looking up the definition of “congruity”) I think this describes what I’m talking about perfectly.
I think it’s an alignment, like parallel vs. perpendicular.
If you identify with your sex at birth, whatever it is, your identity is aligned with your biological sex at birth, that is called Cisgender. Parallel.
If your gender identity is not aligned with your biological sex at birth, it is at an angle to it, perhaps perpendicular (you were a boy baby but are a woman) perhaps a different angle (perhaps were born a girl and are non-binary). Anything other than that parallel alignment is thrown into the Trans bucket, but particularly the perpendicular arrangements.