It's difficult to say about the future of Bernardo Silva, sometimes Pep Guardiola says the opposite for his players. He is an important player for this club, and we really need him, after a few days the player in question left the club. Maybe Pep is acting like that to maintain the mentality and concentration of other players so they don't get distracted by the transfer market.
I think Man City, especially Pep, will have no trouble if they lose Silva, because there will be many other players they can easily recruit. But in line with what you said, sometimes the adaptation process will be the biggest challenge, especially since the EPL is very competitive every season.
Despite with rumor Bernando Silva leaves Manchester City in this summer but he still in starting line up last pre season match against Atletico Madrid, I don't think Pep Guardiola will loss Bernando Silva because still placed Silva in Manchester City scheme. Barcelona and PSG are teams linked for signing Bernando Silva not opening yet proposal with how much bid offer until few weeks later before window transfer closing.
Pep Guardiola seems not sell yet Bernando Silva although have many player available replace his position but Silva still important player under Guardiola's scheme.
Don't forget, Primer League will begin two weeks later and Manchester City will be opening match for FA Community Shiled against Arsenal, its seems interested for The Citizen opening first tittle in season 2023/24 by winning Community Shield tittle.