Personally, I prefer Karn as a "he." It makes the character more human to be a creation which identifies with a specific gender. The ability to understand gender and identify with one gives Karn (like Ultron or Pinocchio) an extra degree of sentience and self-awareness. Them assigning gender to themselves prioritizing identity above origin is similar to NGB (non-gender binary) people. Taking that away in canon makes him more like the default construct. I vastly prefer Ashiok for my NGB fix.

My point was that Karn has never been “refer to me as he”. People refer to Karn as “he” because he seems more “he” than “she” from outward appearance and Karn’s response has been “whatever”.This isn’t a topic that’s ever really been discussed in story, so all I was saying is maybe one day it will. And maybe it never will. I was just pointing out that Karn, by definition, doesn’t actually have a sex or gender.