To be honest, I think its fairly clear that both Wan-Bissaka and Maguire were scouted with Jose Mourinho's style and system in mind. Somehow, when Mourinho left, nobody rebooted the system and we just kept on bringing in players suited to him despite trying to go in a different direction.
If you think about it, even Bruno is a Mourinho type #10: Hardworking, able to create stuff out of nothing and make the most of quick transitions. The kind of ace you need if you're not that bothered about patterns of play etc.
It says a lot about how United just allow things to drift that several of our targets have remained the same, regardless of who the coach is, and I imagine that's been a huge problem this summer: Ten Hag being presented with potential transfer targets who are completely incompatible with his style and ideas, just cos nobody thought to ask the scouts to take a look at his Ajax teams and suggest players who could do similar things to the players he's been managing.