If you follow the rumors, you should have noticed that the latest "current" rumor is that Bavaria is not interested in Haaland, but wants to renew Lewandowski's contract.
I maybe miss this rumor, the last rumor I heard was Lewandowski wants to leave Bayern and ready to move to Real Madrid. If Lewandowski failed to leave, of course they are not interested to sign Haaland. Haaland or Lewandowski doesn't want to sit on the bench, it will be a conflict to have two superstars with the same position. In addition, signing Haaland requires expensive transfer fees and he must ask for a big salary. This is possible to lead for a financial problem in Bayern Munchen.