Stargate Atlantis, Avatar, Babylon 5, and Farscape are examples of scifi with bodily transformations, from the accidental, to alteration without consent, to alteration with full consent. Communication stones. Retroviruses. Changing hosts. Etc.
Seeing the world as a sci-fi fan and with limitless possibilities, the big deal people make over transgender and transrace is petty and shallow. Too many people can’t accept the diversity we already have here on Earth and leave one another be, let alone adding other possible races from the universes into the mix.
We are all beautiful, whatever our forms and however the those forms may change, and we are more alike than different. I am thankful to be a scifi fan and to see beauty everywhere!