source: astra/4.3.1/page.php

<?php
/**
 * The template for displaying all pages.
 *
 * This is the template that displays all pages by default.
 * Please note that this is the WordPress construct of pages
 * and that other 'pages' on your WordPress site may use a
 * different template.
 *
 * @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(); ?>

                <?php astra_content_page_loop(); ?>

                <?php astra_primary_content_bottom(); ?>

        </div><!-- #primary -->

<?php if ( astra_page_layout() == 'right-sidebar' ) : ?>

        <?php get_sidebar(); ?>

<?php endif ?>

<?php get_footer(); ?>