Lazio, Tottenham and Galatasaray are still strong challengers for Manchester United so facing them is not an easy matter and Manchester United's condition which has not fully improved will actually be a worry when they will face one of the three teams. Amorim must maximize the Europa League because this is the only way that might bring them to the Champions League and if they can maximize it well, the opportunity will open up. But it should be remembered that coming out as champions is not easy because we can see how Leverkusen, who performed very well in the previous season in the Bundesliga, failed because they lost to Atalanta in an unpredictable way.
Amorim has no chance to get the Champions League through the Europa League because Manchester United are too weak to do it. Moreover, I think Amorim should focus on the Premier League because they are doing so badly there that if Manchester United continue to lose, Amorim could lose their place much faster than it was initially expected. I don’t think it’s wise to spend energy on the Europa League when they are only 7 points away from the relegation zone in the Premier League.
Amorim should focus on the premier league. His team isn't strong enough to multitask yet. I still believe he has a future with Manchester United in the near future hopefully in the next season but for this very one where he is yet to understand the team he should just build hard to find a good position in the premier league ahead of next season and hopefully qualify to get ticket for the CL.
The Europa league is competitive for Amorim at the moment. Ten Hag left the team without any solid structure and Amorim will have to figure things out for himself and come up with a working system.