https://www.techradar.com/news/google-has-already-helped-patch-a-serious-flaw-in-fortnite-for-android

Epic Games has decided to release Fortnite for Android outside of the Google Play Store, presumably because it doesn't want to give Google a 30% cut of its revenue. The Fortnite installer has to be downloaded from the Fortnite website instead.

One of the potential problems that brings with it is security: apps outside the Google Play Store aren't subject to the same checks and scans as those inside it. Well, it turns out Google is still keeping an eye on Fortnite – it recently identified a security flaw in the Fortnite installer, which Epic Games has since patched and made safe.