[7][8][9] Due to the agreed transfer of Kosta Nedeljković to Aston Villa, and then the news about his injury,[10] Mimović extended his contract with Red Star Belgrade.

[11] He was added to the first team under coach Vladan Milojević, but the possibility was left, in accordance with the established Rulebook, that he could also play for OFK Beograd in the rest of the season.

On 20 August 2024, he scored in his continental debut with a 55th minute substitute, against Bodø/Glimt in a UEFA Champions League Qualifying Round 1st leg match, in 2-1 away game lost.

[16] In September 2022, Mimović received an invitation from Jovan Damjanović to the Serbia U19 team for the "Stevan Vilotić Ćele" Memorial Tournament.

[19][20] He made his debut against Luxembourg U21, in Serbia's sixth match in 2025 UEFA European Under-21 Championship qualification Group F. Then he replaced Uroš Lazić in the 79th minute, and the event ended with a score of 1–1.