This is clearly a "wrong" move by apple.
Epic will lose access to Apple's tools which means that Epic cannot provide updates to their Unreal Engine for iOS anymore, let alone provide an entirely new version of Unreal Engine for iOS. All this means is that Unreal Engine gets locked in time which will make it eventually outdated for developers who seek to make games for iOS, so developers might be looking for a different engine.
Unreal Engine games that are already on Apple's store or are still in development are not affected by Apple's move. Apple is only targeting Epic here.
EDIT: Actually, there are Unreal Engine games that will be taken down in case that Epic loses their license on August 28th: All of Epic's own games, so not just their Fortnite will be gone.Last edited by RolStoppable - on 17 August 2020