As I've mentioned a few times (with resistance from a few), Haaland will be almost invisible & these spells happen at Dortmund. His overall play is far behind the likes of Mbappe & it will become more evident as the season goes along/against better teams.
With regards to Salah, his game has evolved quite a bit year on year at Liverpool, with making chances being almost as important as scoring. He's getting criticised for his supposed lack of impact, yet he had most chances created prior to the weekend.