Probably Manchester City are still evaluating their options and have not arrived at a conclusion whether or not they need to sell Bernardo Silva or consider him still an important player for them in the coming season else they would be making plans already to get suitable replacement for him. Barcelona and PSG are prepared to battle for who will get his signature this summer. It is up to Manchester City to decide if they will sell.
City have already lost Gundogan this offseason and letting Silva go is not a good thing as they are two very strong main team players. Guardiola understands this well and although there are no irreplaceable players, he understands that it will take a lot of time to find a worthy replacement, I doubt that Guardiola would like to let go of a player like Silva. Donnarumma is a very good goalkeeper by the way and I would be interested to see him in City.