Right?
He is his child's father, nothing more. What he thinks he knows means nothing. He is not an expert on transgenderism. Why would anyone give credence to what he claims? Seriously, how would a 2-year-old know they were transgender.
A child's early expressions of gender identity are not a clinical diagnosis of gender dysphoria. Children develop a
self-perceived gender identity. A high proportion of prepubertal children with gender dysphoria do not continue to show such dysphoria after puberty. Gender-atypical behavior is not uncommon in the general population. (BJPsych Bulletin, April 2023, Philip Graham)