If your server is "Running" but invisible in the Steam Server List, follow these 3 steps:
Network: Go to the Network tab. Ensure you have at least two ports (Game and Query).
Startup: Check the Startup tab. Ensure the Query Port variable matches the port in your Network tab.
If you don't see these variables in the Startup tab:
Go to the Files tab.
Open the game's configuration file (e.g., server.cfg, settings.xml, config.json).
Locate the port and queryport lines. Manually type your assigned port numbers from the Network tab.
Save and Restart the server.
Public Flag: In your config file, set IsPublic or SteamVisibility to "True" or "1".
Pro Tip: Steam usually shows servers via the Query Port. If this port isn't correctly assigned in your Files or Network tab, the server will remain hidden.
If you need help with this, please submit a ticket.