That's because they're not playing as a midfield trio. Walker, Rodri and Cancelo is the midfield trio. Gündy, Haaland and De Bruyne are playing ahead of them.
We've had a couple of years of the false-9 (or Gabby as an actual 9) dropping back into midfield. What we have now is the "midfield" pushing right up alongside the striker instead, to prevent Haaland getting isolated and so we have runners that can play off him and take advantage of the space he creates.
But we're still struggling to find the balance. It'll come