Oganesyan was part of the German junior group[2] that competed at both the 2019 European and World Championships, finishing 12th in Baku and 10th in Moscow.

[3] Alina integrated the senior group in late 2021, competing at the World Championships, finishing 7th in the All-Around.

[4][5] In 2022 she was selected to perform in the 5 hoops exercise at the 2022 Rhythmic Gymnastics European Championships in Tel Aviv, Israel, scoring 30.150, the group came in 12th place in the all-around.

[6] In late August she competed at the World Cup in Cluj-Napoca, winning bronze in the 3 ribbons + 2 balls' final.

[9] Following Bulgaria and Israel's withdrawal Germany was able to medal in the team competition, Alina and her teammates Anja Kosan, Daniella Kromm, Hannah Vester, Francine Schöning and the two individuals Margarita Kolosov and Darja Varfolomeev were awarded silver for their results.