JK Rowling gets a pass because she doesn't explicitly say "transwomen are men" or "$NAME is a man" even though that is clearly what she believes. She comes close, e.g. with tweets like https://twitter.com/jk_rowling/status/1597611298728337408, but doesn't cross the line.

Whereas others who just go ahead and say it will eventually get their accounts suspended.

It's the dogwhistle versus the foghorn.