Starting at age seven, Peng played with FC Ems in mixed youth teams. She later joined the Southeastern Switzerland boys' team and was supported there by coach Romano Cabalzar from age 12 to 17.
From July 2017 Peng was employed by FC Zürich in an all-female team for the first time. In August 2019 she was nominated as first-choice goalkeeper. As an FCZ player, Peng made six appearances in the UEFA Champions League.
After a 2021–22 season with two titles, she signed a professional contract with Gothenburg club BK Häcken in Sweden's Damallsvenskan league.[2] In her first season she made three league appearances and one cup appearance.
In January 2023, Peng was loaned to Spanish Liga F club Levante until the end of the season.[3]
Peng joined Bundesliga club Werder Bremen in summer 2023.[4] Peng made her debut as a starter on the first day of the championship in the 5-1 away victory over FC Nürnberg.
The following year Peng was in the squad with the U19 national team for the first qualifying round of the 2020 U-19 European Championship. Coach Nora Häuptle used her in two of the three group stage matches. Peng did not concede a goal against Austria and Latvia, guaranteeing her team's advancement to the next round. However, due to the COVID-19 pandemic, UEFA decided to cancel the tournament before the start of the elite phase.[5]
Senior
Peng was called up to the senior national team for the first time in November 2020, alongside Gaëlle Thalmann and Seraina Friedli as third goalkeeper. She was in the squad for the European Championship finals in England in the summer of 2022.[6] On November 11, 2022, she was in goal during the first half of a friendly against Denmark, but that game was only counted as an unofficial friendly as more than six substitutions were made.[7] Her official debut finally came a few months later, as a starter in the home friendly match on February 21, 2023, a 1-1 draw with Poland.[8] She was included in the list of 23 players called up for the 2023 World Cup on 4 July of that year.[9]
