My gender identity is female. If pressed, I will admit to being trans-female. And, if pressed harder, I will admit that my femaleness is probably not 100% binary. Close to it, though: I am much closer to being binary female than to any variety of non-binary.
My sex (meaning the configuration of my genitals) has changed, thanks to the good surgeon. And my paperwork has changed to match. My gender identity has not changed. I now understand that I have always been female, since at least as far back as I can remember, and likely back to before I was born. They told me that I was male, but they were wrong.