Parse HTML content in CodeIgniter 4

I'm using Codeigniter 4.

PHP Code:

$template = 'Hello, {firstname} {lastname}';
$data = [
    'title' => 'Mr',
    'firstname' => '<h1>John</h1>',
    'lastname' => 'Doe'
];

$parser = \Config\Services::parser();
echo $parser->setData($data)->renderString($template); 


This is producing,


But adding htmlspecialchars_decode() with this is working properly.

PHP Code:

echo htmlspecialchars_decode($parser->setData($data)->renderString($template)); 


My question is, is it the right way? Why I need to add this raw function? Is there any parameter or something for this? This was working in CI3.

Thanks in advance.