Frenkie de Jong was always the most effective player for Barcelona and thanks to his performance they could get good results however Frenkie de Jong was recently injured and this affected the performance of this player a lot. De Jong is a player in Barcelona they want to have him for a long time.
If Frankie De Jong is important with Barcelona, it's time to raise a big question on how Barcelona, many times, treated De Jong very badly?
They many times tried to kick him out of the club as a useless player. I loved kind of football Barcelona played with Pep, Enrique era with tiki-taka but their club management is terrible and it's undeniable that how terrible management strategies they have in many years. They did it with Messi, Suarez, Xavi for two times as a player and as a coach. They did it with De Jong, as said, and they will continue doing this in future, perhaps with Yamal.
the contract of De Jong will end in 2026 and after that, he will be a free player. Barcelona sent him an offer and they wanted to have De Jong for a longer time and extend his contract, also De Jong got a good enough salary in Barcelona. So far he hasn't agreed to extend the contract and this made Barcelona to think about putting him up for sale.
They want to extend the contract of De Jong and if he rejects the offer they will earn money by selling him for another team
I knew different things that Barcelona tried to force De Jong leaving their club. Offers are like Barcelona reasons to legitimate why they have to let De Jong goes. I don't see real efforts from Barcelona to keep De Jong in their club.