I miss App-Folders and Files after create a app

Hello and good day to all.

I'm new to RVM, Ruby and Rails and I have a problem.

I use RVM.

If I create a new RAILS app with the following command:
rails new appname -d mysql
Do I get the impression that the structure of the app folder is incomplete. I don't have any subfolders, only files.

There is a list of files:

.gitattributes
.gitignore
.ruby-version
Gemfile
README.md
Rakefile
config.ru

Information about my system and environment:
OS: Rocky Linux on a Hypervisor VM
Version: "9.2 (Blue Onyx)"
Updates: all installed

RVM Version: rvm 1.29.12 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io]
Ruby Version: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
Rails Version: Rails 7.1.1

A Synology NAS with mariaDB 10

What's the Problem in my case?
Has anybody an idea, please?