Very interesting and thoughtful article - sorry for what author has been through.
I've been thinking about ana/dysphoria connection - given sadly how many kids seem to have dived deep into one or the other during the pandemic. It's interesting because both are ways of trying to control life and of course COVID made control of life even more out of reach for adolescents as a time when they want to start asserting it. I know three people whose kids have needed hospitalisation due to eating disorders (2 girls, 1 boy) all around the age of my oldest (13).... who has declared themselves non-binary (she/her/they/them).
Fortunately they are not dysphoric and I think not likely to become so - I breathed an inner sigh of relief the other day when they said they weren't sure if they were she or they, but they're sure they're not 'he' and also that they have no interest in physically changing themselves and their happy with their body. Because I do know what starts as 'I'm gender-fluid/NB' can gradually change to 'I hate my boobs' and/or 'I'm a boy'. Now I've kept an open channel of communication with DC, told them my view that I think to fight gender constructs (as I think a lot of these NB kids feel they're doing) it's better to 'own' your birth sex and say 'I can be a man/woman however I want' and so on, and they'll come to whatever conclusions they come to, but I hope they'll stay away from dysphoria. I might well show them this article and discuss that they should stay away from 'dysphoria' tiktok, as it may have some cute kids, but it can make harmful behaviour look 'cute' - they are rightfully horrified by the idea of pro-ana sites, so I think this bears some sensitive discussion.
Writer also makes a very good point that some of these fluid or trans boys don't want to be men - they want to be pretty, skinny boys. It makes me think of something I reflected on - that I don't imagine many trans boys in mixed schools want to use the boys' toilets. They want a certain aspect of 'being a boy', but not all of it.