We didn't see Haaland's outstanding performance against Real Madrid. And he missed some great opportunities. However, we can expect Haaland to perform well against Inter Milan as their defense is not as strong as Manchester City's attack.
At least haaland was making all of madrid defenders were paying their attention to him. Haaland has been missing some golden opportunities but if you were watching how all of defenders from real madrid put their focus into the haaland.
It's not the same like the first leg when any defenders of real madrid have their own target to be marked during the match. Haaland is always become a threat for its opponent but when it will be facing intermilan. I think that intermilan is also having lukaku which has same capabilities as haaland as forward.
Haaland acts as a substitute for the Real Madrid defense, and that allows other players to take advantage of existing gaps to score goals. That is part of the strategy, Pep Guardiola is well aware that this player will get tight marking, so he takes advantage of it with other players who can act as real goalscoring targets. And the strategy worked flawlessly.