Intl transliterator conversions of strings

Code
<?php

$trans 
Transliterator::create('Any-Upper');
echo 
$trans->transliterate('äčģfş') . PHP_EOL;

$trans Transliterator::create('Any-Hex');
echo 
$trans->transliterate('A');
Result
ÄČĢFŞ
\u0041
Used Versions
PHP 8.0, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8