[5][6] She played just one game in the 2019–20 season after she tore her cruciate ligament at the 2019 FIBA Under-19 Women's Basketball World Cup.

[8] For the 2022–23 season, Fiebich joined Casademont Zaragoza of the Liga Femenina de Baloncesto.

[12] On 17 April 2020, the Los Angeles Sparks selected Fiebich with the 22nd overall pick in the 2020 WNBA draft.

[19] She helped the Liberty win the WNBA championship with a 3–2 Finals victory over the Minnesota Lynx.

[20] Fiebich won the silver medal with the German national under-16 basketball team at the 2016 FIBA Under16 European Championship where she averaged 11.9 points, 11.6 rebounds and 1.6 assists per game.

[21] She also participated at the 2018 FIBA Under18 European Championship where she won the gold medal and averaged 11.7 points, 8.7 rebounds and 2.3 assists per game and was selected to the "team of the tournament.

[22][23] She also participated at the 2019 FIBA Under-19 Basketball World Cup where she averaged 7 points, 9 rebounds and 3.3 assists per game.