Here are the steps you can do it:
Let’s assume that the information to display to players is stored in room properties.
After connecting to the designated room server by its address taken from the invitation, the room information will be available by searching for a room with the designated primaryKey. However, some C++ code is required to search for a room via a primaryKey.
Please refer to the how-to article in the Strix Unreal SDK User’s Guide on how to do this.