The Classic Row’s Column Container is the same as the New Row’s Global Container. Both options simply apply the Global Site Width and Max Width.
The difference between the Classic Row and the New Row is that the New Row uses Flex Layout. To replicate the Classic Row and Column setup, you need to adjust the Flex options so it’s essential that you learn about Flex first. You can learn here https://theme.co/docs/use-flex-layout and also from our video here https://www.youtube.com/watch?v=6pN_a4eD5NM
Looking at your site, you didn’t turn the Global Container to On as my colleague suggested.
Setting the Global Container to On will surely work as they are the same as I’ve said above.
Hope that helps.