[3] After switching to taekwondo, Wiliams was first selected to be part of the British national team at age 14 and has since been training in Manchester.

In 2021 - as the Games were postponed due to the COVID-19 pandemic - Williams tore her right hamstring three weeks before the taekwondo fights yet won the Olympic silver medal in the under 67 kg weight category, only losing the final to Matea Jelić.

Williams later expressed regret regarding the final, which she led by six points until the last ten seconds[10] when Jelić suddenly turned the match around, stating to have had a 'mental block' during the end of the last round.

[12] In 2022, she won a bronze medal in the 67 kg weight class at the European Championships and the Grand Prix, both times in Manchester.

[6] Due to a ruptured hamstring tendon at the 2023 Rome Grand Prix, she did not participate in the 2023 European Games in Kraków and underwent surgery in June.