And not just on reddit either.
Trans identified men, including some who have posted on this site, are constantly talking about how their ingestion of cross sex hormones, their extreme body modifications and overall adoption of female social sex stereotypes, actually makes them the opposite sex. There was also that big- jawed lawyer on Channel 4, who complained about the Supreme Court decision saying that every 'cell in his body has become feminised', so because of that, he shouldn't be excluded from female spaces.
I remember reading a comment from a self proclaimed "transsexual woman" activist, on a substack article regarding the paused puberty trials, who asserted multiple times that sex is mutable because children who are given exogenous cross sex hormones early enough, will grow up to be the opposite sex. Here's part of their comment: "An MtF ends up a sterile female, from molecular biology up to phenotype. For example."
During the Sandie Peggie employment tribunal, the trans-identified male doctor Theodore "Beth" Upton, described himself as a "biological woman" who would impose himself on female patients in the event that they requested a female doctor for intimate care.
Here's an excellent article with multiple examples of trans-identified men, including prominent activists, describing themselves as "biological women" and "female", including the fragrant India Willoughby.
https://speakingplainly.substack.com/p/is-it-really-true-that-no-ones-denying
This quote is really apt:
"Is it really true that “no one's denying the reality of biological sex”? There seems to be a lot of people doing that thing that "no one" is doing"