LabelTranslationDomainExtension.php

<?php

namespace App\Form\Extension;

use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class LabelTranslationDomainExtension extends AbstractTypeExtension
{
    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefault('translation_domain', 'form_labels');
    }

    public static function getExtendedTypes(): iterable
    {
        yield FormType::class;
    }
}