Finding Multiplayer Games
You can find available sessions by calling “Find SteamCore Sessions“, you can also apply “Search Settings” filters to filter out unwanted sessions
This Example has a Video Tutorial that you can find here: Related Video
To find multiplayer sessions call the "Find SteamCore Sessions" node, this will give you a list with possible sessions to join.
Search filtering options
You can also filter session results using SearchSettings, the example below will only give you results of sessions that have the "UsingSteamCore" bool set to true.