Demo showing Content/Right Sidebar layout. The content is added via the page’s admin section WYSIWYG editor.
The Sidebar content is the global sidebar, configured by adding widgets via the “Appearance > Widgets” page accessed from the left menu (or under the “Customize” section).
If you want a page specific sidebar instead of a global sidebar, you can select the “Full Width” icon in the “Layout Settings” section of this page.
Next, click the “Page Builder” tab of the page admin, and in the page builder, you can add various layouts with sidebars.