I can't start a thread in Bugreport so I will create here one:
The typo is on:
https://docs.plesk.com/de-DE/obsidian/administrator-guide/webserver/apache-und-ngnixwebserver-linux.71933/
It is: "Apache- und ngnix-Webserver (Linux)"
But it should be: "Apache- und nginx-Webserver (Linux)"