Hello,

I have set up a custom field for variable products, this is the code in my functions.php, it works great I can add, save and delete the EAN.

// Add Variation Meta Field
add_action( 'woocommerce_product_after_variable_attributes', 'variation_settings_fields', 10, 3 );
// Save Variation Settings
add_action( 'woocommerce_save_product_variation', 'save_variation_settings_fields', 10, 2 );

// Create New Fields for Variations
function variation_settings_fields( $loop, $variation_data, $variation ) {
  
  	// EAN Text Field
	woocommerce_wp_text_input( 
		array( 
			'id'          => 'EAN[' . $variation->ID . ']', 
			'label'       	=> __( 'EAN', 'woocommerce' ), 
			'placeholder' 	=> 'Pls enter EAN if available',
			'desc_tip'    => 'true',
			'description' 	=> __( 'Enter the EAN Number (UPC,EAN)', 'woocommerce' ),
			'value'       => get_post_meta( $variation->ID, 'EAN', true )
		)
	);
  }

// Save new fields for variations

function save_variation_settings_fields( $post_id ) {
  
  	$ean_post = $_POST['EAN'][ $post_id ];
	// save the EAN
	if(isset($ean_post)){
	  update_post_meta($post_id,'EAN', esc_attr($ean_post));
	}
	// remove if EAN meta is empty
	$ean_data = get_post_meta($post_id,'EAN', true);
	if (empty($ean_data)){
	  delete_post_meta($post_id,'EAN', '');
	}     
}

How can I display the EAN on the product page ?