I don't think Rashford would get any other opportunity in Manchester United, Amorim made it clear when he arrived, though i don't know why he came to such a decision, the attackers in Manchester United are not any better than Rashford. United keep hiring managers who cannot keep some of their pride aside and coach the team, that's why they keep clashing with players, Amorim is going down that same direction, just like his predecessor, Ten Hag, and we saw how that ended for him.
From my observation, Ruben Amorim has started making the same mistake Erik Ten Hag made. It seems he is having problems with some important players. He has decided to let some of them leave the club and the players he is buying are not better than the ones he is sending away. I hope the Portuguese knows what is ahead of him? If he repeats his performance last season and fails to qualify for a European competition, he would definitely be sacked.