Winning their next two Europa League matches is possible because the opponents are not too good; and at the same time, their performance against Liverpool was hell superb, but we can’t judge by just one match.
Nevertheless, the Tottenham I am seeing among the top challengers are not doing well this days, therefore, Manchester United can be the top favorites if they can win their next two matches.
Don't use Manchester United performance in derby to conclude that they're beginning to pick from as they'll disappoint you. Isn't this the same Manchester United that won Manchester city in the last cup finals that both clubs played and some individuals began to think that the old Manchester United are back but immediately the season started, they began to flop from where they stopped last season. Manchester United can still win the Europa club as they're meant to do that as there isn't many teams that should be giving them much trouble since they're the biggest there but they won't instead they'll drop out of the tournament faster than many of us would have predicted.
Manchester United seem to be very proactive during derby matches and at such shouldn't be mistaken for any improvement in the club's ability to win games, against Manchester city they played some exceptional football by coming from behind to snatch a late winner only for then suffer two straight losses after that. I don't think their woes are over yet, not even because of their heroic performance against Liverpool, I can't imagine picking Manchester United to win in my selections when predicting games and wouldn't advice anyone to do same either until the team is fully fortified with the right players, until that is done I don't think they are on the path to recovery yet.