Onyedika was trained at Nigerian club FC Ebedei and came to Europe in 2019. After a loan spell at FC Fredericia (Denmark), he fully broke through last season with the senior team of Midtjylland. Onyedika impressed in the Danish top league and in the Europa League. Additionally, he won the cup with his team. His strong performances earned him the title of Best Young Player in Denmark.
Club Brugge was captivated by the defensive midfielder and managed to convince him to join FCB. He has signed a contract until 2027.