Yes, I was also very impressed to see FC Copenhagen in the preliminary round until they were able to qualify for the knockout phase. Even though previously the Danish representatives did not get a good assessment at all to be able to qualify and it turns out they were able to prove that.
FC Copenhagen will certainly bring the same enthusiasm when they meet Manchester City. I think Copenhagen will carry out the same maneuver again during the group stage and they will not be burdened at all. Due to what has been done, Manchester City must be aware of this threat, because even though City is very favored, Copenhagen cannot be taken lightly as an opponent.
Initially, I personally underestimated Copenhagen. Especially after they lost to Man United in the first Copenhagen meeting in the group stage. But in the second meeting against Man United I was surprised because Copenhagen were able to avenge their defeat in the first match by winning the second match. And my surprise also increased when I saw that Copenhagen was able to hold Bayern to a draw. Even though I think Bayern's current performance is at their best. But Copenhagen can keep up with it. Even though Bayern continued to control the game at that time, Copenhagen also occasionally made things difficult for Bayern with their counter attacks.
So I also think that Pep Guardiola's troops must be careful and not underestimate Copenhagen. Because maybe Copenhagen will give you a surprise. But because maybe by then Haaland will have returned and now De Bruyne will also be active again, I think Man City will still not lose to Copenhagen. Unless Man City is careless and underestimates their opponent.