How is the update of the game in the Appstore?

Question

iOS

Soon I will post my online game in the Appstore for iOS.
And I am extremely concerned about the question - how is the process of releasing an update in the Appstore?
The game has serious technical limitations in the case of major updates, when all old versions of the client stop working when the server is updated - compatibility between versions is impossible. The player is shown a message that he needs to upgrade.
That is, it is necessary to fill in the client update in advance and activate it at the right time. Is it possible?

Answer 1

Maybe.
After successfully passing the review, you yourself will release the approved version in the store by pressing a button. According to Apple, it may take 24 hours before the release of a new version of the application in all countries. Usually much less.