Get fully rendered page content through ajax call!

Beaver Builder
1

Hi,
my task/problem is similar to this one:

trying to get the fully rendered content of a page with ajax call to wordpress api.
but somehow i am not able to get it done.

my current code:

add_action('wp_ajax_loadmore', 'loadmore_callback');
add_action('wp_ajax_nopriv_loadmore', 'loadmore_callback'); // For non-logged-in users

function loadmore_callback() {
    // Ensure the AJAX request came from WordPress and is valid
    check_ajax_referer('loadmore_nonce', 'security');

    // Get the page ID from the AJAX request
    $page_id = isset($_POST['post_id']) ? intval($_POST['post_id']) : 0;
    $response = array();

    if ($page_id > 0) {
        // Use WP_Query to fetch the page by ID
        $query_args = array(
            'page_id' => $page_id,
            'post_type' => 'page', 
            'post_status' => 'publish'
        );

        $query = new WP_Query($query_args);

        if ($query->have_posts()) {
            while ($query->have_posts()) {
                $query->the_post();

                // Start output buffering to capture the page content
                ob_start();

                // Get the page content
                the_content();

                // Capture the output and end buffering
                $page_content = ob_get_clean();

                // Send the page content as the response
                $response['success'] = true;
                $response['html'] = apply_filters('the_content', $page_content); // Allow shortcodes and other filters

                // Break the loop after fetching the first matching page
                break;
            }

            // Reset the post data
            wp_reset_postdata();
        } else {
            $response['success'] = false;
            $response['message'] = 'Page not found or not published.';
        }
    } else {
        $response['success'] = false;
        $response['message'] = 'Invalid page ID.';
    }

    // Send the JSON response
    wp_send_json($response);
}

What i get as response is content only, without rows, columns and other stuff generated by BB modules etc. what am i missing here, hope someone can point me in the right direction!