Display Custom Fields

I currently have the custom fields displaying and saving on the admin side. Here’s that code.

// Display Fields
add_action('woocommerce_product_options_general_product_data', 'woocommerce_product_custom_fields');

// Save Fields
add_action('woocommerce_process_product_meta', 'woocommerce_product_custom_fields_save');

function woocommerce_product_custom_fields()
{
    global $woocommerce, $post;
    echo '<div class="product_custom_field">';
    // Custom Material Name
    woocommerce_wp_text_input(
        array(
            'id' => '_material_field',
            'placeholder' => 'Material',
            'label' => __('Material', 'woocommerce'),
            'desc_tip' => 'true'
        )
    );
    //Decoration Field
    woocommerce_wp_text_input(
        array(
            'id' => '_decoration_field',
            'placeholder' => 'Decoration',
            'label' => __('Decoration', 'woocommerce'),
            'desc_tip' => 'true'
        )
    );
    //Lamination Field  
    woocommerce_wp_text_input(
        array(
            'id' => '_lamination_field',
            'label' => __('Lamination', 'woocommerce')
        )
    );
	    //Handles Field  
    woocommerce_wp_text_input(
        array(
            'id' => '_handles_field',
            'label' => __('Handles', 'woocommerce')
        )
    );
    //Closure Field  
    woocommerce_wp_text_input(
        array(
            'id' => '_closure_field',
            'label' => __('Closure', 'woocommerce')
        )
    );
	    //Lining Field  
    woocommerce_wp_text_input(
        array(
            'id' => '_lining_field',
            'label' => __('Lining', 'woocommerce')
        )
    );
	    //Minimum Field  
    woocommerce_wp_text_input(
        array(
            'id' => '_minimum_field',
            'label' => __('Minimum', 'woocommerce')
        )
    );
	echo '</div>';
}
function woocommerce_product_custom_fields_save($post_id)
{
    // Material
    $woocommerce_material_field = $_POST['_material_field'];
    if (!empty($woocommerce_material_field))
        update_post_meta($post_id, '_material_field', esc_attr($woocommerce_material_field));
// Decoration
    $woocommerce_decoration_field= $_POST['_decoration_field'];
    if (!empty($woocommerce_decoration_field))
        update_post_meta($post_id, '_decoration_field', esc_attr($woocommerce_decoration_field));
// Laminiation
    $woocommerce_lamination_field = $_POST['_lamination_field'];
    if (!empty($woocommerce_lamination_field))
        update_post_meta($post_id, '_lamination_field', esc_html($woocommerce_lamination_field));
// Handles
    $woocommerce_handles_field = $_POST['_handles_field'];
    if (!empty($woocommerce_handles_field))
        update_post_meta($post_id, '_handles_field', esc_html($woocommerce_handles_field));
// Closure
    $woocommerce_closure_field = $_POST['_closure_field'];
    if (!empty($woocommerce_closure_field))
        update_post_meta($post_id, '_closure_field', esc_html($woocommerce_closure_field));
// Lining
    $woocommerce_lining_field = $_POST['_lining_field'];
    if (!empty($woocommerce_lining_field))
        update_post_meta($post_id, '_lining_field', esc_html($woocommerce_lining_field));
// Minimum
    $woocommerce_minimum_field = $_POST['_minimum_field'];
    if (!empty($woocommerce_minimum_field))
        update_post_meta($post_id, '_minimum_field', esc_html($woocommerce_minimum_field));	
}

//Display custom fields on backend
	
function woocommerce_custom_fields_display()
{
  global $post;
  $product = wc_get_product($post->ID);
    $custom_fields_woocommerce_title = $product->get_meta('woocommerce_custom_fields');
  if ($custom_fields_woocommerce_title) {
    	printf(
            '<div><label>%s</label><input type="text" id="woocommerce_product_custom_fields_title" name="woocommerce_product_custom_fields_title" value=""></div>',
            esc_html($custom_fields_woocommerce_title)
    	);
  }
}
 

I have this code, but it isn’t displaying.

function aq_wc_insert_additional_information() {
	while (have_posts()) : the_post();
wc_get_template_part('content', 'single-product'); 

// Display the value of custom product text field
    echo get_post_meta($product->ID(), '_custom_product_text_field', true);
// Display the value of custom product number field
    echo get_post_meta(get_ID(), '_custom_product_number_field', true);
// Display the value of custom product text area
    echo get_post_meta(get_ID(), '_custom_product_textarea', true);
   
endwhile; // end of the loop. 
}
add_action( 'woocommerce_display_product_attributes', 'aq_wc_insert_additional_information' );