Bernardo Silva and Ilkay Gundogan are rumored to be leaving Manchester City soon. I know they have been important players in the Manchester City squad in recent seasons, so I think Manchester City will have a very hard time finding replacements for both of them if both players leave this season.
Gundogan has been linked with move to Barcelona, then Silva will go to PSG. If these reports are true, then of course Manchester City are in big trouble especially about finding the right replacement.
Ilkay Gundogan had a wonderful season this year. He won the admiration and respect of everyone with his performance. However, Manchester City did not offer a contract that would convince him. I think he will definitely leave the team. However, Bernardo Silva has a contract for 2 more years and is one of the most important players of the team. I don't think there is anything that requires him to leave the team. Manchester City will make a transfer to the midfield instead of Ilkay, but I don't think they will make radical changes in the starting 11. I think it would be a risky choice and Manchester City would not prefer such aggressive changes.