The full width page template allows you to override the default page width and use a full width design on any theme.
Create a New Page, and Edit with Elementor.Click on the settings icon on the Left side, and under Page Layout look for the Elementor Full Width option
How To Set A Default Page Layout
If you would like to set a default page layout across your entire site, do the following:
Click the Hamburger Menu in the Widget PanelClick Site SettingsClick LayoutChoose the Default Page Layout that you wish to set as the default layout across the site