Bayern is just trying their best to be the best team with the money they have and mane is their big hope to replace Lewandowski but talent like Lewa is hard to find. there is still hope for Bayern to be able to maintain their good performance, as long as they manage to get harry kane then their problem will be solved.
Players who have high skills and patience like Robert Lewandowski are very difficult to find, but if Bayern Munich prefers players who have a young age with good skills, maybe they will get it easily, because Robert Lewandowski is a player that is really wanted by many teams.
I don't think filling Lewandowski's void will be easy for Bayern Munich. There is no doubt that Lewandowski is a talented player. But more importantly, Lewandowski has been with Bayern Munich for a long time. He played 8 long seasons with Bayern Munich. And so he blends in very well with Bayern Munich's players and match tactics. This is why it is difficult for Bayern Munich to find a suitable replacement for Lewandowski. But they can recruit young talented players.