Symphony extension is not listed, why?

Question

symfony

Without the use of bundles, the extension can be included in the core

protected function build(ContainerBuilder $container)
    {
        $container->registerExtension(new SomeAppExtension());
    }

However, the debug:config console command does not show it in the list.
It's like it's not there, and it's like it's there...

Answer 1

RewriteBase /
Redirect 301 /en site.ru/ru