Trying to start DLSS drama with misinformation. They removed it temporarily to check if all the new rendering features work fine in tandem with it. They’ll add it back once they’ve fully tested it.
Looks at post and who it was posted by...... shocker....

Patch notes:

The Next Generation of Fortnite Battle Royale is Powered by Unreal Engine 5.1
Fortnite Battle Royale is now on Unreal Engine 5.1. Nanite, Lumen, Virtual Shadow Maps, and Temporal Super Resolution are available in-game. Read more!
Note: DLSS in Fortnite on PC is temporarily disabled as we test to ensure it works properly alongside the UE5 features.