Apart from Arsenal, Barcelona, and Juventus, I don't see any other strong contender that is capable of stopping Manchester united in the Europa league. Eric Ten Hag has done a great job so far, and I believe he is setting every system to go for the Europa league title. Manchester United is so hungry to get a title for some seasons now, it will be so good to see them register another Europa league title after the last one in 2017 in Sweden.
In Europa League right now if we compare Arsenal and Barcelona with Manchester United this is much better because with their current form and on and off the field issues I have feeling Juventus is not able to compete with them as they are losing momentum after the deduction of points most chances they will be not able to stay into top ten spots in Italian league at the end of this season and these other three clubs are having much better quality and strength for competing in this event.
With few other clubs are also doing good progress for the better results, but things are not favourable for them specially as Erik ten Hag bring changes in Manchester United most chances if they are able to pass Barcelona challenge they will be able to win this title.