I don't expect Erik ten Hag to get sacked in case of saying goodbye to the Champions League in the group stage already. The board would give him more time for the sake of the Premier League. However if things still continue to go badly there also then he might not be able to see the end of the season there.
Manchester United are going to have a really difficult match against Bayern Munich home in the last fixture here.
Bayern Munich have already guaranteed advancing as the leader. We saw how Copenhagen got a point from them in Allianz Arena as well.
Manchester United can also defeat Bayern Munich home if they play decently.
There is a chance for Manchester United precisely because Bayern has already secured a place in the playoffs, otherwise I would say that with the current form, Manchester United have no chance. But even in this case, I assume that Bayern will not give it up so easily, although there is no point in Tuchel bringing the main squad to Old Trafford, it is better to give the main players a rest. And even if Manchester United can win, not everything will depend on them, they will need Copenhagen and Galatasaray to play in a draw.
However, I see that there is prestige between two big clubs at stake, Bayern will definitely try to avoid defeat and will not make Manchester United happy. In fact, I think with United latest situation after being beaten by Newcastle, efforts to secure 3 points at Old Trafford are becoming increasingly thin, because after all beating Newcastle should be easier than beating Bayern later. It makes sense, I think, but we'll see how United journey in the UCL ends this time.
Personally, I think the Ten Hag squad chances of qualifying are closed, not a good idea expecting the Copenhagen versus Galatasaray match to end in a draw. It could be that even Galatasaray has the chance to fail because Copenhagen will act as hosts. If Copenhagen advances to accompany Bayern, then what a surprise, they will succeed in breaking all we predictions so far.