Disable zipcode validation on checkout and shipping calculator on the cart in WooCommerce on child sites.
Snippet Type
Execute on Child Sites
Snippet
add_filter( 'woocommerce_shipping_calculator_enable_postcode', '__return_false' );
add_filter( 'woocommerce_default_address_fields' , 'wc_disable_postcode_validation' );
function wc_disable_postcode_validation( $address_fields ) {
$address_fields['postcode']['required'] = false;
return $address_fields;
}