This is taken from the Epic Games Support site here
, check out their Support site for additional assistance with the EGS launcher itself. This will also allow you to add Steam friends to your Epic Games account:
- Login to your Steam account in the Steam client.
- Login to the Epic Games Launcher.
- On the right-hand side click on See all above your friends list.
- Click the person icon with a plus sign.
- Click on Steam.
Note: If Steam doesn’t appear as an option, you will need to sign into Steam on your computer then restart the Epic Games Launcher.