Dh was neutral "oh it's all nonsense" until I showed him what is happening in sports. That changed his perspective, and also opened his mind to understanding that women's experiences of the world differ from men's. For example why we feel uneasy walking home after dark, that expectations about our behaviour are imposed on us for no rational reason, that women do more than 'just pee' in toilets. While he is entirely gender critical, I'm not sure he understands just how captured our institutions are.
I can talk with him about it.
My sons completely understand that claiming you can change sex, or are a different sex, or are no sex at all, is nonsense - but I would not class them as gender critical. They aren't convinced that sex is not a spectrum. They are still stuck in the view that you can do or be anything you want as long as you don't harm others - and as it doesn't harm them they don't yet understand that it is harmful to society. They have no desire to upset their trans-identifying friends. One is also at uni, where he does not want to be involved (censured!) in this political stance.
I can touch on the subject with them.
My daughters - woke and hurting. The cognitive dissonance is tearing them apart. They understand that women are oppressed due to their biology. They understand that femininity and masculinity are merely stereotypes. Yet they are also full-on TWAW etc.
I cannot even approach the subject with them.
To make things worse, my family members all have strong autistic traits (some are diagnosed with ASD). I am convinced that our dds' confusion is because of their awareness that they don't fit comfortably in society, and social media and social infection has put this idea in their heads that the reason they don't fit may be that they are trans.