Handling extra long state field label with CheckoutWC and WooCommerce

rearrange-fields.php

<?php
/**
 * Handling long state labels
 *
 * Example: German state field label exceeds state field container ("Bundesland / Landkreis (optional)")
 */

// Option 1: Rearrange address fields to make state field wider
add_filter(
	'woocommerce_default_address_fields',
	function( $fields ) {
		$fields['country']['columns']  = 6;
		$fields['state']['columns']    = 6;
		$fields['postcode']['columns'] = 6;
		$fields['city']['columns']     = 6;

		return $fields;
	},
	100000 + 100
);

// Option 2: Require the state field
add_filter(
	'woocommerce_get_country_locale',
	function ( $locale ) {
		$locale['DE']['state']['required'] = true;

		return $locale;
	},
	10,
	1
);