The club did not offer a scholarship to the highly-rated winger.
The U17 invitee had made it clear that he was not interested in extending his stay at Stamford Bridge.
He was a member of the Golden Eaglets squad to the 2019 U17 Africa Cup of Nations.
He joined Chelsea from another London club, Crystal Palace at the age of twelve.
The 16-year-old has already trained with West Ham, Glasgow Rangers and German Bundesliga club Hoffenheim in recent weeks.
The Nigerian made his debut in the Premier League 2 against Newcastle United in August 2019 at the age of 15.