source: astra/3.8.1/index.php

<?php
/**
 * The main template file.
 *
 * This is the most generic template file in a WordPress theme
 * and one of the two required files for a theme (the other being style.css).
 * It is used to display a page when nothing more specific matches a query.
 * E.g., it puts together the home page when no home.php file exists.
 *
 * @link https://codex.wordpress.org/Template_Hierarchy
 *
 * @package Astra
 * @since 1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
        exit; // Exit if accessed directly.
}

get_header(); ?>
<?php if ( astra_page_layout() == 'left-sidebar' ) : ?>

        <?php get_sidebar(); ?>

<?php endif ?>
        <div id="primary" <?php astra_primary_class(); ?>>
                <?php 
                astra_primary_content_top();
                
                astra_content_loop();

                astra_pagination();

                astra_primary_content_bottom(); 
                ?>
        </div><!-- #primary -->
<?php 
if ( astra_page_layout() == 'right-sidebar' ) :

        get_sidebar();

endif;

get_footer();