The article you cite has this sentence in it "Awareness of the distinction between sex and gender is another vital element to inclusive, quality research Conflating the two harms and invalidates gender minorities by implying that these distinct attributes are inextricably linked." That seems to me like a specific claim that Trans women are not biological males because their gender is female even though their biological sex is male. The rest of the article seems to imply otherwise, but doesn't reconcile itself with these sentences.