Fortnite has been updated to version 3.21 by Epic Games. You can find out the complete patch notes for this update from here.
According to Epic Games, this is a maintenance patch for the game that is being deployed for the PS4, PS5, Xbox One, Xbox Series, and PC. It is not available yet on the Nintendo Switch. The issues resolved in this update include stability on Xbox One and Combat Pro control layout on all platforms. Get the details on this update below.
Fortnite Update 3.21 Patch Notes
We are deploying a maintenance patch on PC, PlayStation consoles and Xbox consoles to address stability issues on Xbox One and to fix the Combat Pro control layout issues. We will let you know when the update is available on Nintendo Switch.