to say the least it will affect the mentality of their players but they have plenty of time before facing psg in the round of 16. maybe I don't think Bayern will face big problems to form a squad to perform better when the league returns. indeed the elimination of Germany in this world cup was very surprising because Germany had high quality players in their team. but I think Julian Nagelsmann is a coach who is able to arouse extraordinary enthusiasm in his players, of course he can succeed in bringing Bayern Munich in the Bundesliga to become the most consistent team when the league resumed after the world cup and in the Champions League, Bayern Munich is a very superior team to win the game against psg.
With the elimination of Germany most chances no club is going to have any negative impact or players could be also faced no problem because recently they are going down in quality which is creating problems for them as well now it's second time in a row they are having this embarrassment hopefully we will have better results and good changes in coming months for the future events.
Now, we have another challenge as Bayern Munich is going to face Paris Sant in coming months which is surely going to have another big challenge with most of the Bayern Munich players were in German squad, but hopefully things could be ok and they mentality will be also settled before this big match Julian Nagelsmann is doing good job after poor start of the season, and he will be gone with strong strategy which will help their team for having success.