[11] In May 2021, Bormann dropped down a weight class and competed in Belgrade at minimumweight for a fight for the WBC Interim, WIBF, GBU and WBF World Championships against Catalina Diaz, which she won unanimously on points.

[14][15] Exactly one year later, in May 2022, Bormann boxed against Ana Arrazola for the WBC Silver title and the IBO minimumweight world championship.

Bormann also won this fight unanimously on points, despite a heavily bleeding cut above her forehead that was inflicted on her in the third round by Arrazola's headbutt.

[16][17][18] In September 2022, Bormann defended her WBC (World Boxing Council) Silver title unanimously on points against Elizabeth Lopez Corzo.

[19][20][21][22] After the fight, Bormann relinquished her IBO world title and thus got the chance in May 2023, after which she was the number one mandatory challenger at the WBC for more than two years (2021 light flyweight and 2021-2022 minimumweight).