Navigate to your relevant blog page page editor and clone section. Right-click on the section settings icon (3 horizontal lines) and disable the new section on tablet and mobile. (This will be your desktop version with the sidebar line. It may be a good idea to...

This is from an Elegant Themes blog post, where they also give some other method options: https://www.elegantthemes.com/blog/divi-resources/how-to-remove-sidebars-from-divi). /*** Take out the divider line between content and sidebar ***/ #main-content...