Women's gymnastics is sexualized. Women do not wear in practice what they are traditionally required to wear in competition, which is leotards that only cover their torsos. Men do not.
Women's gymnastics has seen its share of sexual abuse of women athletes.
Sarah Voss wore ar full-body suit at the European Artistic Gymnastics Championships. She was supported by her country's gymnastics federation. She is proud of her decision. "We hope gymnasts uncomfortable in the usual outfits will feel emboldened to follow our example," she said.
https://www.bbc.com/news/world-europe-56858863