Brandl started practising the Korean martial arts taekwondo in 2007 and participated in her first international competition in 2013.

[4] Brandl competed in the World Championships in 2015 in Chelyabinsk, 2017 in Muju and 2019 in Manchester in the +73 kg weight category, where she remained without a medal each time.

[9] Brandl competed at the 2023 World Championships in Baku, where she lost in the +73 kg weight class in the opening fight (round of 32) to Nika Klepac of Croatia.

[12] In August, she represented Germany at the 2024 Summer Olympics, where she competed in the +67 kg event and defeated Arlettys Acosta in the round of 16.

Here, she won against Munira Abdusalomova from Tajikistan and therefore qualified to the bronze medal contest, where she fought against Lee Dab-in.