Barcelona is facing difficulties in the la liga while MU is starting to handle the performance to beat another team easily in EPL. The quality from MU can be seen from last 5 matches. MU is only losing one time but MU has been starting to perform so well
Barcelona is still firmly at the top of the Laliga standings
Their performance is still quite good, we can see their statistics in Laliga since the start of the season. I realize Manchester United have come a long way lately but that happened in the EPL. Erik Ten Hag needs to mentally prepare his players because next month they will face teams from other leagues like Barcelona, this will of course be different from their opponents in the EPL
If Manchester United are becoming stronger in English premier it also means they will be tough in the Europa league. Manchester United know they don't have any chance of winning the premier league, this might make them to be serious with the Europa league to win the league.
The Europa League has its own level of difficulty because it is play by teams from several leagues, not the same as what they face in the premier league.
If they feel the chances of winning the EPL title will be tough then the same will happen in the Europa League as Manchester United will be competing with the like of Freiburg, Barcelona, Feyenoord, Sociedad and Arsenal.