If Amorim does not show good progress in a short time, maybe his fate will not be much different from Ten Hag and previous MU coaches. There is a lot of hope that Amorim can change MU into a strong team after Ruud van Nistelrooy tried his best in several short MU matches. Amorim has a job to at least improve MU's performance, if not, he might be compared to Ruud van Nistelrooy by fans. It will definitely feel uncomfortable if such a situation occurs in the team.
Ten Hag stayed in Manchester United for two years, that's a long time considering he didn't give any contribution to the team. I'm sure the fans will compare him with Nistelrooy because shit can happen, Nistelrooy only become a coach for 4 match, while Amorim might have more than 30+ match and I don't think he will able to make Manchester United to have undefeated record.
Amorim might recruit Gyokeres if Hojlund or Zirkzee can't score many goals.