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’m a firm believer in having a wide enough vocabulary available to discuss issues.
Btw, if you want more opinions on the topic, threads talking about demographic survey design in trans communities have discussed this issue. Not sure how easy it would be to find threads that focus on it, but r/asktransgender has almost certainly had this topic come up occasionally.