~snip~
Bilbao will lose their valuable asset but they will also benefit from the sale of this player which is clear that Barcelona really wants this player because Barca feels that the combination of Lamine Yamal with this player will be very suitable for next season in deepening their strength as they work together in the European arena so that brings Spain won Euro 2024 thanks to their performance and I think Nico Williams will also be happy because he will join his colleague at the same club.

Source :
Lamine Yamal and Nico Williams You are right, Nico Williams is one of Lamine Yamal teammates in the Spanish national team and seeing how he made big contribution to the team was able to bring Spain to win Euro 2024.
Of course there will be many team see his potential and want to have Nico Williams, just like Barcelona which is currently starting new season with new coach and of course has efforts to utilize summer transfer window.
Moreover, he also performed well and there have been many big changes in his development during these two seasons playing for Bilbao, I sure that move to big team can improve his quality and playing skills significantly in the future.
But seeing as several rumors circulating are all still related to Barcelona financial problems, to be honest I haven't found any clear certainty about what the future holds regarding this transfer option.
I have previously mentioned the transfer issue, but I'm sorry if I have to discuss it again, basically Barcelona in the last few seasons has always had difficulty recruiting players because of their financial problems and who knows when this problem will end. But rumors are that Barcelona fans will help to recruit Nico Williams but it looks like the donation is not enough to bring in this player.
I think Barcelona needs to sell one of the players or several players order to redeem this player because if they don't do this they will lose Nico Williams and there will be another club that recruits this player so Barcelona You have to move quickly if you really want it.