Add section to modern page

• command: spo page section add -n|--pageName <pageName> -u|--webUrl <webUrl> -t|--sectionTemplate <sectionTemplate> --order [order]
• pageName: name of the page to add the section to
• webURL: URL of the site where the page to edit is located
• sectionTemplate: type of section to add. Allowed values OneColumn|OneColumnFullWidth| TwoColumn|ThreeColumn|TwoColumnLeft|TwoColumnRight
• order: order of the section

For more information see the Add-PnPClientSidePageSection cmdlet.