Not necessarily. The manager usually gives the higher ups in the sporting department his input about the players he would like to keep, those he prefers selling, and the ones he would like to purchase. Donarumma's contract expires at the end of the 2025/2026 season and he was negotiating a new one. I think that signals that Luis Enrique wanted to keep him. But it seems that those negotiations have stalled and that the club doesn't want to meet the player's and his agent's requests. There have been cases where contracts haven't been signed or extended due to player agents and their demands. The clubs agree terms with the player, but can't agree a percentage with their managers.