Form theme in Twig / Symfony - symfony

Question

With Symfony and Twig, I have this form and this form theme :
TrainingVersionType (this is collection) :
class TrainingVersionType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', null, [
'attr' => [
'autofocus' => true,
],
'label' => 'label.training_name',
'ico' => 'pencil',
'translation_domain' => 'administration',
])
->add('document', FineUploaderType::class, [
'label' => 'label.attachments',
'translation_domain' => 'administration',
'limit' => 1,
'acceptFiles' => [
'image/jpeg',
'image/png',
],
'allowedExtensions' => [
'jpg',
'jpeg',
'png',
],
])
;
}
Form theme in my Twig file :
{% block _training_versions_entry_name_widget %}
<strong style="background: red; padding: 20px">
Ok 1 :)
</strong>
{% endblock %}
{% block _training_versions_entry_document_widget %}
<strong style="background: blue; padding: 20px">
Ok 2 :)
</strong>
{% endblock %}
Why I have "OK 1" and I don't have "OK 2" ?
In my config.yml, I have this global form theme, But this is Widget for "FineUploaderType" :
{% block fineuploader_widget %}
<div class="qq-uploader-selector card mb-3 bg-light">
<div class="card-body">
<div class="qq-upload-button-selector">
<span class="btn btn-info">
{{ 'action.select'|trans({}, 'fineuploader') }}
</span>
</div>
</div>
</div>
....
{% endblock %}
I want to add div in "document" entry in the form, for add help after FineUploader widget.
Can you help me ? :) Thanks
Edit :
administration/training/new.html.twig :
{% form_theme form 'administration/training/_form_theme.html.twig' %}
{% block content %}
{{ include('default/page/_new.html.twig', {
form: form,
btn_ico: 'plus',
btn_value: 'action.training_new'|trans({}, 'administration'),
back_label: 'action.training_back'|trans({}, 'administration'),
back_path: path('administration_training')
},
with_context = false
) }}
{% endblock %}
administration/training/_form_theme.html.twig :
{% block _training_versions_entry_name_widget %}
<strong style="background: red; padding: 20px">
Ok 1 :)
</strong>
{% endblock %}
{% block _training_versions_entry_document_widget %}
<strong style="background: blue; padding: 20px">
Ok 2 :)
</strong>
{% endblock %}