It is hard to pick what my favorite piece of Awful Radfem Discourse is, but I think this might just win the prize.
Okay, but to answer the question. It’s more of a correlation thing.
Trans girls are often anime girls, for example, but not all anime girls are trans girls.
I’ve long had a theory that some groups that are drawn to anime are drawn to it because it telegraphs emotions in a very blatant manner.
For people around gender issues, it also often leaves facial features more vague and less gendered.