Dortmund have slowed down a little about their young player transfers these days. They have brought amazing names to the team so far such as Haaland and Bellingham. Their total profit in the sales of these two players was really good. There are a lot of talented players in the pool right now surely. Dortmund just don't want to rush anything for now.
Maybe a central midfielder transfer would be really good for Dortmund. Because it was Bellingham's main position and now there isn't anyone there whose position is that naturally. They can surely look for a big talent like Bellingham for this position.