The quickest way to add a new Wrapper is to use the Quick Add Element dropdown at the bottom of the plugin to insert a new blank Wrapper layer to your email design, when your Emailify email Figma frame is selected.
This will add a brand new empty Wrapper layer with a single empty Row layer inside of it, which you can start populating with content layers, or drag and drop existing Row layers from your email into.
π Wrapper layers can only be added directly to an βοΈ Email frame, and can only contain one or more π£ Row layers inside of it.