Why do aliases work in OpenServer only when they are configured in the op itself?

Question

open server

Why does it work like this in the OP:

, and when you try to do the same, but nothing comes out in the Apache config? Here is an example Apache_2.4-PHP_7.2-7.4_vhost.confof a file where I have already added to the very end of itVirtualHost

<VirtualHost *>
    DocumentRoot "d:/openserver/domains/yii/frontend/web"
    ServerName my.ru
    ServerAlias www.my.ru
</VirtualHost>