The multiplicitry and complexity of the cyborg paradigm has attracted many to it because it leads to a reconception of self in ways they belief both more accurate and more politically repsonsible that what they take to be the traditional Western emphasis on unified being. The proper state for a Western person is to have ownership of the self, to have and hold a core identity as if it were a possession. That possession may be made from various raw materials over time, that is, it may be a cultural production, or one may be born with it.
Gender identity is such a possession.
Not to have property in the self is not to be a subject, and so not to have agency. Others writing on the subject, arrive at very similar positions from very different starting points. But we're a little more tightly organized than the multiple personality. We all have things we've forgotten, areas we don't remember. Different parts do different things.