I've been reading about gender issues for quite a long time, and I admit that even now I'm still totally confused between the difference between 'body dysmorphia' (for whatever reason) and 'gender dysphoria'. On paper, I get what gender dysphoria is - to an extent. I understand, to some extent, that it isn't a mental illness.
But - body dysmorphia is very much a mental illness.
And when you start looking at the assistance, help, support offered to people with gender dysphoria - it's shockingly focused on changing bodies.
There's a survey at the moment for trans/gender diverse people in a particular region, and nearly all the questions are assuming 100% that such people want or need to have hormones, surgery, and other bodily changes. This seems to be to be somewhat of a conflation between gender and body - or gender and sex.
And, as seems to be the case very often, everyone uses these terms and assumptions completely differently without defining them.
For some people, 'trans' means someone who has had surgery to change their body from one set of sex characteristics to another.
For other people, 'trans' means questioning ideas of gender and may mean no 'transition' at all, or perhaps using different name/pronouns, but accepting that gender may not have any relevance to one's body as it's what's inside that's the 'true' gender.
The longer these terms remain woolly and undefined, the longer we are all going to talk at cross purposes.