Fortnite isn't on Microsoft's Xbox Cloud Gaming service because

Epic Games isn’t putting Fortnite on Microsoft’s Xbox Cloud Gaming service because it views the platform as a competitor. An Epic Games executive has revealed why Fortnite isn’t on xCloud.

What Microsoft means when it says 'Xbox Everywhere' - Protocol

Video: Playing Fortnite on an iPad With Xbox Cloud Gaming

Here's How to Play Fortnite on iPhone Without the App Store

Xbox Cloud Gaming is coming to Meta Quest

Logitech G Cloud Review: An Ideal Xbox Accessory - TheStreet

Fortnite is not coming to Microsoft xCloud because Epic doesn't want it to

Microsoft upgraded Xbox Cloud Gaming for Linux and ChromeOS (so Steam Deck too!)

Fortnite Isn't on Xbox Cloud Because Epic Apparently Doesn't Want it--But Why?

Xbox Cloud gaming (and Xbox.com in general) not letting me sign in - Microsoft Community

You can't play Fortnite on Microsoft's xCloud because Epic wouldn't allow it

Fortnite Xbox Support