There's been a huge outcry regarding Scarlet Johansson playing a woman who has been retroactively transed (because that is apparently okay); the issue is that the character she will be playing is being understood as a transman, and so trans activists, including many trans actors, have said SJ should not play this part, and that only a trans person should play the role. The thing is they want to play all sorts of roles, so they want all the trans roles but others too. That is the first double standard. The second is that they are all assuming her gender identity, meaning either that they are basing this on her appearance or they think that she doesn't have the right to privacy regarding gender identity that trans people claim and thus because she hasn't come out as trans that means that she isn't.
All kinds of knots going on there....