Just in case you were unaware, Fortnite developer Epic Games is waging its own war with Apple right now. It introduced its own payment system in Fortnite and got kicked off of the App Store. Now, Epic is suing Apple, and Apple is disabling the company's developer account. And on the day that that's set to happen, Apple is featuring Fortnite's chief competitor, Playerunknown's Battlegrounds, on the App Store.
Obviously, it could all be a coincidence. Apple might just be promoting PUBG because of an update that's slated to arrive on September 8. It might just be a happy side-effect that the company is promoting the idea that there's an alternative to Fortnite in the App Store.
The only way that Apple would allow Fortnite to return is if Epic Games removes its new direct payment feature, which side-steps Apple's requirement that all payments go through it, so it can take a 30% cut. Of course, Epic knew all about these rules when it broke them, and it had its lawsuit and promotional video ready to go as soon as the game was pulled from the App Store.
If you want to read about the upcoming update for PUBG though, as you can still play it on an iPhone, you can find Apple's story here.