[2] Freweyni Hailu gained her first international experience in 2018 at the World Junior Championships in Tampere, Finland, where she placed fifth in the women's 800m event.

[4] At the Games, she finished in fourth place in a time of 3:57.60 behind only, 1–3, Faith Kipyegon, Laura Muir and Sifan Hassan.

[7] In January 2024, competing in Ostrava, she won the women’s mile setting a meeting record and a world leading time of 4:17.36.

[9] She won the gold medal in the final of the women's 1500 metres race at the 2024 World Athletics Indoor Championships in Glasgow.

[12] The following week, she won over 3000 metres in 8:19.98, improving on the world-leading mark she had set in Ostrava nine days prior and moving up to third on the world indoor all-time list, in Liévin on 13 February 2025.