Sonnet allows you to create unlimited amount of Widget Areas, and these widget areas can be assigned to several areas of the site such as the sidebars and WPBakery Page Builder Widgetised Sidebar.

Navigate to Appearance > Widgets and click the ‘Create Widget Area’ button (Fig. 1) and you can add, or delete any of the custom widget areas you create.

Create Widget Area Screenshot.
Fig. 1. Create Widget Area Screenshot.