Removes the required status for all WooCommerce Checkout Billing Fields

wc-remove-billing-fields-required.php

/**
 * Sets all WooCommerce billing fields to be unrequired.
 */
function wc_unrequire_billing_fields( $fields ) {
	$fields['billing_first_name']['required'] = false;
	$fields['billing_last_name']['required'] = false;
	$fields['billing_company']['required'] = false;
	$fields['billing_country']['required'] = false;
	$fields['billing_address_1']['required'] = false;
	$fields['billing_city']['required'] = false;
	$fields['billing_state']['required'] = false;
	$fields['billing_postcode']['required'] = false;
	$fields['billing_phone']['required'] = false;
	$fields['billing_email']['required'] = false;
    
	return $fields;
}
add_filter( 'woocommerce_billing_fields', 'wc_unrequire_billing_fields' );