Kaylia’s career in gymnastics began in France at four years old. In 2022, a knee injury and disagreements with the French Gymnastics Federation kept her out of all championships apart from the Arab Championships in October 2022, where she made her senior competitive debut and won two golds and a silver medal. In 2023, she won gold at the African Championships, qualifying for the 2023 World Championships in Belgium, where she won silver on the uneven bars category, becoming the first African gymnast to claim a world championship medal. She bagged a gold medal on uneven bars in the Paris 2024 Olympics, a first for Algeria and any African gymnast at the Olympic Games, and topped the global ranking in her category.