I personally don't think Manchester United will be the favorite team in the Europa League next season, eventhough Manchester United have a good squad but still, there is no guarantee for Manchester United to get the Europa League trophy. After all,last season also Liverpool became a very favorite team because Liverpool in last season still had a good squad and coach, but in fact Liverpool, AS Roma and also Bayer Leverkusen failed to get the Europa League trophy. Therefore, I believe the Europa League trophy winner is completely unpredictable because every team in the Europa League has the chance to get the best results in the Europa League.
I think Manchester United has good team but it is too early to say they will win Europa League. Last season we saw that Liverpool AS Roma and Bayer Leverkusen had good teams too but they did not win. This shows that anything can happen in Europa League and any team can surprise us. Manchester United has chance to do well, but we'll have to wait and see. The team that can adjust and play their best at the right time will likely win.
I don't see Manchester united winning Europa and they might not go far as you think. Have you forgotten that nothing has changes in the club, Ten Hag is still their manager with his worst performance last season. Manchester united performance last season makes them not deserve to play in Europa next season.
Of course as luck was on their side because when it is your lucky day everything will work in your favor to be successful, this was how United got to Europa after winning City on the finals of FA cup. This is why I don't expect much from Ten Hag amd his boys only if he has improved his squad.