Example on how to remove the Content Browse Button from the Left Siedbar in eZPlatform 2. Note: you can dump $root and remove/add or reorder items ;)

ConfigureLeftSidebarMenuListener.php

<?php

declare(strict_types=1);

namespace AppBundle\Event\Listener;

use EzSystems\EzPlatformAdminUi\Menu\Event\ConfigureMenuEvent;


class ConfigureLeftSidebarMenuListener
{

    public function onMenuConfigure(ConfigureMenuEvent $event): void
    {

        $root = $event->getMenu();

        $root->removeChild('sidebar_left__browse');

    }

}

services.yml

services:

    AppBundle\Event\Listener\ConfigureLeftSidebarMenuListener:
        tags:
            - { name: kernel.event_listener, event: ezplatform_admin_ui.menu_configure.content_sidebar_left, method: onMenuConfigure, priority: 10 }