Customize html KnpMenuBundle in Symfony 5.X

_menu.html.twig

{% extends 'knp_menu.html.twig' %}

{% block item %}
    {%- set is_heading = ('heading' in item.attribute('class', [])) %}

    {{ parent() }}
{% endblock %}

{% block spanElement %}
    {% if is_heading %}
        {{ block('heading') }}
    {% else %}
        {{ parent() }}
    {% endif %}
{% endblock %}

{% block label %}
    {% if is_heading %}
        {{ block('heading') }}
    {% else %}
        {# Customize your HTML / CSS Here !#}
        {% if item.extras.icon_class is defined %}
            <i class="{{ item.extras.icon_class }}"></i>
        {% endif %}
        {% apply spaceless %}
            {{ item.label|trans }}
        {% endapply %}
    {% endif %}
{% endblock %}

{% block heading %}
    <h3 class="uppercase font-red-thunderbird">
        {{ item.label|trans }}
    </h3>
{% endblock %}

homepage.html.twig

<!-- BEGIN SIDEBAR MENU -->
  {{ knp_menu_render('main') }}
<!-- END SIDEBAR MENU -->

knp_menu.yaml

# KnpMenuBundle Configuration
knp_menu:
    twig:
        template: '_menu.html.twig'

MenuBuilder.php

<?php

namespace App\Core\Menu;

use Knp\Menu\FactoryInterface;
use Knp\Menu\ItemInterface;

class MenuBuilder
{
    private $factory;

    public function __construct(FactoryInterface $factory)
    {
        $this->factory = $factory;
    }

    public function createMainMenu(): ItemInterface
    {
        $menu = $this->factory
            ->createItem('root')
            ->setChildrenAttributes([
                'class' => 'menu-nav',
            ]);
        $menu->addChild('Home', [
            'route' => 'homepage',
            'extras' => [
                'icon_class' => 'fa fa-home',
            ],
            'attributes' => ['class' => 'menu-item  menu-item-submenu'],
        ])->setLinkAttribute('class', 'menu-link');

        return $menu;
    }
}

services.yaml

services:
    app.menu.builder:
        class: App\Menu\MenuBuilder
        arguments:
             - '@knp_menu.factory'
             - '@security.authorization_checker'
        tags:
            - { name: knp_menu.menu_builder, method: createMainMenu, alias: main }

twig.yaml

twig:
    paths:
        - '%kernel.project_dir%/templates'
        - '%kernel.project_dir%/vendor/knplabs/knp-menu/src/Knp/Menu/Resources/views'