Despite no evidence, there's endless speculation and just askin' from the western media.
Contrast this to:
This statement, however, ignores that the history of women’s sport, from tennis to weightlifting to shot put, and yes to boxing, is peppered with athletes who did not conform to stereotypical, European standards of womanhood, including, ironically, European athletes.
Whereas we previously accepted that some women were indeed bigger, stronger or faster, than others, now it appears that many of us expect female athletes to be cookie-cutter images of each other and seek to punish those who do not conform. For all the growing awareness of non-binary gender, it seems we are growing less tolerant of any deviation from the stereotypical norm.
As many others have already pointed out, Khelif has been boxing in women’s competitions for many years, including at the 2020 Tokyo Olympics without these accusations arising. She has produced pictures of herself as a young girl, spoken of the challenges of boxing as a female in her Algerian culture, and has been defended by the IOC and Algerian officials.
Which leaves the Colin Wright's and others playing the maybe trans card with not much other than a vivid imagination and an apparent lack of exposure to female body types about the globe.