Get an overview of Epic Online Services and how you can use it to add cross-platform authentication, voice chat, matchmaking, and more to your game for free. Topics include: key functionality, getting started, and how to use the SDK/Unreal Engine Online Subsystem plug-in.
https://dev.epicgames.com/community/learning/talks-and-demos/XmRv/unreal-engine-power-your-games-with-free-epic-online-services-unreal-fest-2022