Why do I have Steam and Xbox games in the Epic Games Launcher Preview Library?
The Epic Games Launcher Preview can detect installed Steam and Xbox games on your device and show them in your Library.
Xbox and Steam game tiles will be marked with a small platform badge.

Follow the steps below, depending on whether you want to show or hide installed Steam or Xbox games:
Select the Epic Games Logo in the top-left corner of the Epic Games Launcher Preview.
Select Settings.
Select Library.
Turn off one or both settings:
Show Steam games
Show Xbox games
Note:Hiding these games doesn't uninstall them from Steam or Xbox. To show them again, turn the setting back on.