In order for you to activate Games follow below mentioned steps.
We request you to find the attached screenshot of the same.
Login to CometChat admin panel.
From Left Menu Click on "Features"
Search for "Single Player Games"
Enable / Disable As per your requirement.
"Clear Cache" from the Admin Panel.
Clear Cache from the browser.
Verify is your game section is display on CometChat Layout on your website.
Click on "..." (Three Dots) the display on CometChat Chat Display.
Search "Single Player Game" & Click on it.