One of the factors is that he is still young he has enough energy so he can overcome obstacles no wonder for the next few years his name will always appear on the scoreboard
Dortmund also realized this so they kept Haaland in this transfer window, btw Haaland has not been able to surpass Robert Lewandowski in the top score list.
Haaland is behind Lewandowski now, but that could change - Borussia has an easier calendar than Bayern, due to the fact that it has already left the Champions League, and the Europa League is not so important. I think that by the end of the championship, when the difference between them in terms of games played decreases (at least in percentage terms), we will be able to more objectively judge which of them was the top scorer this season.