Just a general FYI, as a consequence of Musk tweeting that cis is a slur, there is now vandalism going on wiktionary.
Transphobes are editing the definition of cisgender to add that it's offensive, and that people prefer "gender-normative" and "nontransgender" (which are so much not a thing that one of those words doesn't even exist on the platform).
I don't know much about how wiki works or how to report this kind of behaviour.
I tried to revert the guy's edit, and literally seconds later he reverted it again.
https://en.wiktionary.org/w/index.php?title=cisgender&oldid=73567303#Adjective
The only "sources" are recent articles reacting to Elon Musk's tweet.