Hide shipping methods when a shipping class is not available in the cart

functions.php

add_filter('woocommerce_package_rates', 'hide_shipping_method_when_shipping_class_product_is_not_in_cart', 10, 2);
	
function hide_shipping_method_when_shipping_class_product_is_not_in_cart($available_shipping_methods, $package)
{

	// Shipping class IDs that need the method removed

	$shipping_class_ids = array(
		27,
	);
	$shipping_services_to_hide = array(
		'wf_fedex_woocommerce_shipping:FEDEX_GROUND',
                'wf_fedex_woocommerce_shipping:FEDEX_2_DAY_AM' 
	);
	$shipping_class_exists = false;

	foreach(WC()->cart->cart_contents as $key => $values) {
		if (in_array($values['data']->get_shipping_class_id() , $shipping_class_ids)) {
			$shipping_class_exists = true;
			break;
		}
	}

	if (!$shipping_class_exists) {
		foreach($shipping_services_to_hide as & $value) {
			unset($available_shipping_methods[$value]);
		}
	}

	return $available_shipping_methods;
}