No it doesn't. The requirements are Android 5.0, and can support something as weak as the Motorola E4 Plus[0]. And as someone who maintains a decently popular app on that platform, you'd be surprised how many former flagships (the Google Pixel in particular) still remain on Android 7.x (my wild guess is so that they can keep the old Google Now launcher) which does not have the selective permissions that come with Oreo.
[0]https://www.androidauthority.com/fortnite-mobile-compatible-...