Yeah it's just a matter of time, Onana also played well last season with Inter and he made it to the final in the champions league of course it cannot be ignored. However, if he has not played optimally with Manchester United, it means something is needed for example he needs more time and need support of course
It is not only a matter of time. But how can Ten Hag manage the team so that they become a solid and strong unit. With this in mind, they are expected to be able to optimize their abilities in their respective lines. With the entire squad getting stronger, especially the defense, Onana only needs to focus on securing his goal without having to worry about their defense. In this case, no matter how good the goalkeeper is, when they have poor defense, the goalkeeper will not be able to be optimal by always making saves. However, of course Onana doesn't just need support but also needs another opportunity to try more optimally.