Epic Games announced via Twitter and the developer-supported /r/FortniteBR subreddit today that a small client update will be released at 4AM the morning of February 18th. The switch version of the update will be slightly delayed, arriving several hours later.
Since v7.40, Xbox users have been unable to play the game with a mouse and keyboard. This update will resolve that and re-enable the feature.
Also included in the update will be fixes to the performance and stability of Fortnite’s Creative mode.
No downtime will be required, however, you will need to restart the client.