The thing is that playing a traditional number 9 role is very simple. You play mind games with the back 3, 4 or 5 all game and you wait. If there are two at the back it becomes a bit more complex and I always used to go to the wide left and hug the line when that happened. I used to score an enormous amount of goals from just playing a basic number 9 role. Some games, you would only see the ball a couple of times in the match. I am only 5ft 10 but i used to be bullied by two center backs at a corner, but i would push them in their back and move away at the right time. I should never have a right to score from a corner at 5ft 10. But I used to score headers and tap ins quite often stupidly often.
My point is, Erling Haaland does everything so basic, and very well. There is nothing complex about his game at all. It is all about being very disciplined and patient. It also helps being as strong as an ox and lightning acceleration though!