I read few days ago that Haaland is not interested in joining Real Madrid if Mbappe is there since he won't be able to shine so he prefer in that case Barcelona so they will reproduce the CR7 - Messi phenomenon.
The question is will Barcelona be able to afford him with the salary demands that he may come along with?
It seems unlikely. They are right on the limits of FFP. They were only able to register Torres by offering Umtiti (who they don't want) a new longer contract in return for slightly reduced wages, so they could comply with FFP:
https://www.theguardian.com/football/2022/jan/10/barcelona-register-ferran-torres-samuel-umtiti-agrees-new-dealThey are a huge club and so will always be associated with the biggest name players, but I can't see how they can afford to bring big names in.