According to the article, she wasn’t just passed over for a promotion, she was also actively demoted, both times for someone LGBTQ+.

“Not long after denying her the new position, her supervisors removed her from her existing job, telling her that they had concerns about her leadership and offering her a demotion that came with a substantial pay cut. She was replaced by a gay man with less seniority.”

The trick for her will be proving it was discriminatory and not for other reasons.