As part of the ruling in the Apple VS Epic lawsuit, Apple would have to implement some pretty big changes to its App Store, such as allowing developers to point users towards alternative methods of payments for in-app purchases, instead of forcing them to use Apple’s own payment system.
However, Apple initially asked for a stay on the ruling, which the judge then denied, but Apple then appealed it and it now appears that they have won. This means that for now, developers for the App Store will have no choice but to use Apple’s own payment system. This stay also does not mean it is permanent.
The court is simply staying the enforcement of the injunction until they are able to fully hear the case, which could take several months. It is possible that Apple could win the appeal, which will ultimately allow the company to keep running the App Store the same way that they are doing already, or if they lose, then they will be forced to implement said changes.
That being said, Apple is already making some small concessions. A few months ago, as part of a settlement of an antitrust investigation in Japan, Apple is allowing developers of reader apps to include an in-app link that would direct users to an external website for them to manage their accounts.