Born in Ovu, Delta State,[1] Idamadudu made her international debut at the 2014 African Youth Games, where she was the 200 m gold medallist.

She was also due to compete for Nigeria at the 2014 Summer Youth Olympics, but the whole team was pressured into withdrawal over concerns about the West African Ebola virus epidemic.

[4][5] She ended the year with three gold medals at the Commonwealth Youth Games, taking the 200 m and two relay titles.

[7] Her performances that year earned her comparisons to Olympic medallist Falilat Ogunkoya from national media.

[7] Idamadudu made her senior international debut at the 2018 Commonwealth Games, reaching the 200 m semi-finals and sharing in the 4 × 400 metres relay silver medals with Yinka Ajayi, Patience Okon George and Glory Onome Nathaniel.