Display Custom Page in Woocommerce Custom Tab

Add below code in fuctions.php file, it will add new tab in product detail page
 

add_filter( 'woocommerce_product_tabs', 'custom_woo_tab');
function custom_woo_tab( $tabs ) {
    $tabs['test_tab'] = array(
        'title'     => __( 'Return Policy', 'woocommerce' ),
        'priority'  => 50,
        'callback'  => 'woo_new_product_tab_content'
    );
    return $tabs;
}

 
Now, Add below code in same functions.php file for disply page content

function woo_new_product_tab_content() {   
    $page_id = YOUR_POST_ID;
    $page_post_object = get_post( $page_id );

    // Get the page content
    $page_content = $page_post_object->post_content;

    //Get the page title
    $page_title = $page_post_object->post_title;

    // The title (Or the page title)
    echo '<h2>Coming Soon</h2>'; // Or: echo '<h2>' . $page_title . '</h2>';

    // The page content
    echo '<div class="page-content-container">' . $page_content . '</div>';
}