The Sun exclusively reported that Amorin believes that Onana's departure is the key to reconstruction.
Onana will join Türkiye Trabzon Sports on loan for one season.
The Sun said that in the past month, Manchester United coach Amorin's relationship with goalkeeper Onana has completely broken down.
Amolin was dissatisfied with Onana's injury at the beginning of pre-season training, and in June, Onana was photographed playing on the mud in his hometown.
Insiders revealed that in the days leading up to international match day, Onana showed a lack of commitment to training. Almost ignored the head coach during training.
Manchester United cleaned up many stars this summer, and players such as Onana, Rashford, Sancho, Garnacho and Anthony left the team one after another. Left-back Maracia will also join the Turkish team Eyup Sports on loan.
Amorin believes that these changes will bring a more positive future to the team and has begun preparing for a derby against Manchester City.