Debated, sure. But there is consensus that the brain is sexually dimorphic. The extent to which is still speculative, but the fact that it is, is not controversial. To say otherwise goes against scientific consensus. Plus, denial of the fact is a central pillar of the gender critical ideology.
Comments
The page you linked describes the ongoing debate and lack of consensus - - include dueling 2021 metastudies with directly contradictory results.
There is no such test. It's an absolute lie.
And one that could impact other trans folks. She was aiming that piece at conservatives, the ones writing laws against us.
Those laws demanding imaginary test results is pat for the course.