Apple released a support document explaining what happens when you remove games from Apple Arcade.
Users who download the game before it is removed from Apple Arcade should start playing “for the most part of the week”. Then they will see the inscription “No longer available.”
At the same time, the developer can make his game available in the App Store for everyone, she can choose a different version offered in Apple Arcade. For example, it may contain ads or in-app purchases.
If the developer allows users to save saved progress in the App Store version, users can launch games from the location they are targeting in the Apple Arcade version. If people develop lungs, start the game again.
Earlier, Apple announced the removal of 15 games from Apple Arcade.
Source: Iphones RU