What I know is that Ruben Amorim will listen to every offer that comes in, and that means if there is an offer for Onana, I think Amorim might sell the Cameroon goalie. But it also does not preclude the possibility that Amorim will buy a new goalkeeper without having to sell Onana first, because as far as I know that Sir Jim Ratcliffe is aiming to sell his other company (OG Nice) and he will be used to fund Man United. If that really happens, then Amorim will most likely get quite a lot of financial support.
I am sure no team is interested in bringing Onana at the same price or close to what Man United initially recruited him.
Regardless of whether Onana is still in the team or not, it is only right for Amorim to bring in another goalkeeper because last season we could see that Onana did not perform well and not only that, Amorim must also get full support from the team management to build the Man United team if they want to be better next season.
No big club that has watched closely, the errors of Onana will want to go after him with the way he's been performing poorly for the longest possible time. The luck he has is that the club still likes him, and if only he can improve, no one will want to sell him off. We can't factor out the fact that the defense of Manchester United has equally contributed how bad Onana has been seen to be but if the defense is being fixed and an additional keeper is brought in to ginger him the more, he can be a good option either as a second option goalie which will mean that he's not going to play all games.
Frankly speaking, André Onana is not all that bad if not that he's playing in a really disorganised team diffensively. Chances can be that he goes to a new team and then he starts to do really well better than he's been seen to be. How he able to manage all the criticism he's been getting and still managing to show up game after game is enough to see that he's a good keeper.