Guys, stop quoting Laporta on Messi. When he said that, he actually believed Messi would stay because Tebas assured him Barca signing LaLigas cvc deal allows them to keep Messi. But then Florentino Perez called Laporta and reminded him cvc deal will be for 50 years and it prevents their superleague. So Laporta had to chose between 2-3 years Messi and a bad cvc deal, which also prevents the superleague for 50 years or release Messi. He chose the latter.
Right now it's a different story. Frenkie has his Bartomeu contract which guarantees him an absurd amount starting this season. Way above the new wage limit Laporta's board set. Barca doesn't want to sell Frenkie, but they also want to reduce their wage bill. So there is a possibility to sell Frenkie if he doesn't agree to the new wage limit. But if Frenkie loves it so much in barcelona and he agrees to do without Bartomeus promised money there will be no selling. In terms of liquidity, barca needs no money. They will activate the 2nd lever and sell the 15% tv money for round about €400m which will take the pressure of LaLiga's ffp.
In the end, it will depend only on Frenkie. The negotiations between those clubs take place in case Frenkie decides to leave. No one can force him.