“Cisgender” is just a made up nonsense word. When someone uses it, I just make up nonsense words in response. Let them try to figure out what the heck people are talking about for a change!
“Homosexual” is also a made-up nonsense word (from the late Nineteenth Century - post-Darwin and post-Nietzsche - as I recall).
There is no viable form of sexuality that can exist between two members of the same sex.
I propose the term “homoeroticism” as being more accurate: the eroticization of intimate contact between two persons of the same sex.