Using Elementor Page Builder to create your header and footer is possible by following these steps:

1. Install the Elementor Header & Footer Builder plugin
2. Go to Appearance → Elementor Header & Footer Builder
3. Click “Add New” at the top
4. Select “Header” or “Footer” at the “Type of Template “setting
5. Click “Edit with Elementor” to start building (or import a prebuilt layout) your own theme header and/or footer