How to center columns?

I am using the columns tool, It looks like the columns are centered in the designer, but when I change to view it everything is slightly aligned left only in the desktop view. In mobile, it looks fine. I thought by default everything would be centered. How do I center the Columns?

When you preview the Desktop view, the Ui panel on the right disappears, making the viewport a little bit wider. So that’s normal that the centered content moves a bit.