Substituting a pronoun with its antecedent in brackets is normal when quoting in English.
The original quote:
“The Nazis burnt books on trans healthcare and research, why are you so desperate to uphold their ideology around gender?”
https://x.com/jk_rowling/status/1767912990366388735
https://xcancel.com/jk_rowling/status/1767912990366388735