[Symfony][Twig] How to use custom form_theme to form child - forms

Question

I am trying to use custom form rendering for category fields which is child form.
When i use it in normal everything works, but i have to use custom form theme to render it differently
{{ form_widget(form.category, {
attr: {
class: 'category',
},
}) }}
My category form type:
class CategoryType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options): void
{
$builder
->add('name', EntityType::class, [
'class' => Category::class,
'choice_label' => function (Category $choice, $key, $id) {
return new TranslatableMessage($choice->getName());
},
'label' => false,
'placeholder' => null,
'expanded' => true,
'required' => false,
])
;
}
public function configureOptions(OptionsResolver $resolver): void
{
$resolver->setDefaults([
'data_class' => Category::class,
]);
}
}
In my main twig with form i have
{% form_theme form.category 'form/custome_theme_categories.html.twig' %}
I created twig view in form/custome_theme_categories.html.twig where i can put
{{ dump(foo) }}
and i don't event get the error that is't wrong or any kind of HTML. It doesn't meter what i put in my new view: i get empty HTML in result.
Is custom field theme done otherwise?