Onana, Manchester United's goalkeeper, did not perform well when playing for Cameroon at AFCON in the round 2 group c match. Cameroon then lost 3-1 against Senegal.
In the third group c match between Gambia vs Cameroon, Onana was benched and Ondoha was entrusted with the goalkeeper position in the ongoing match.

The Cameroon coach realized after seeing and assessing Onana's abilities when they lost against Senegal and Rigobert Song didn't want Cameroon to lose again by placing Onana as the main goalkeeper against Gambia.

My question is, why is Erik ten Hag too confident in Onana to guard Manchester United's goal, who often makes mistakes when Manchester United play?