If the writing and publishing field , for example, discriminates against feminine gendered people, then why wouldn't those people with a common cause stand in solidarity?
Men can't be 'feminine gendered people'. No matter how much lipstick they wear, no matter what pronouns they adopt.
The 'feminine gender' applies only to women. Some men do enjoy taking on stereotypically feminine appearance norms, whether for self expression or because they find it sexually arousing. Still, their interest in feminine stereotypes invariably begins and ends with the superficial (make-up, clothes), and nobody treats them like women.
As for Bernadine Evaristo, it is disappointing that she's endorsing trans ideology in the press, but that doesn't necessarily mean her book is crap. Lots of young women are identifying as 'non-binary' these days, so it seems a suitable subject for a female author. I wouldn't automatically refuse to read a book because it had a 'non-binary' female character - it would depend on how the author approaches the issue.
While I do understand the feeling of frustration towards Evaristo and others (especially Atwood), I think we need to forget about the vast majority of authors, actors and singers doing anything other than parroting the woke line. When it comes down to it, celebrities and artists are hustlers - they need to network and stay in with the press, and public image is everything to their brand. Very few are going to stand up for anything genuinely controversial. I don't understand why GC feminists keep challenging celebrities on Twitter about trans issues. It only ever results in them doubling down and then acting the martyr about how the mean feminists 'abused' them.
It will be ordinary people, not celebs, who will turn the tide against this ideology.