Settings ServerName and ServerAdmin in apache2.conf are not shown in PHP-Variables

Question

I was edit the apache2.conf and insert this Lines:

# Global configuration
#
ServerName server-16.******.de
ServerAdmin max.mustermann@******.de

But this values i can't see in the php variables if i look in phpinfo(). The results are:

$_SERVER['SERVER_ADMIN'] webmaster@localhost
$_SERVER['SERVER_NAME']  192.168.**.**

Why are the values not accepted?

Installed Software: ubuntu 22.04 lts Apache/2.4.52 (Ubuntu) PHP 8.1.2 (cli) (built: Apr 7 2022 17:46:26) FPM/FastCGI

thanks for support