Why there isn't any file and folder except 'node_modules' and 'package.json' anymore when creating a project with 'npx create-react-app' command?

I created a react project with the 'npx create-react-app my-app' command before, and the 'my-app' folder contains these files and folders:

my-app
├── README.md
├── node_modules
├── package.json
├── .gitignore
├── public
│   ├── favicon.ico
│   ├── index.html
│   └── manifest.json
└── src
    ├── App.css
    ├── App.js
    ├── App.test.js
    ├── index.css
    ├── index.js
    ├── logo.svg
    └── serviceWorker.js
    └── setupTests.js

But now, when I create a react project with the same command, the 'my-app' folder contains only the 'node_modules' folder and the 'package.json' and 'yarn.lock' files.

my-app
├── node_modules
├── yarn.lock
└── package.json

I thought probably using an outdated version of create-react-app, then to fix this, I did the following steps:

1. Removing the old version of CRA by running npm rm -g create-react-app
2. Installing the new version globally by running npm install -g create-react-app

But my issue still existed. The last thing that came to my mind was upgrading node.js from v10 to v12.16.3, but nothing didn't change.

This problem occurred because there is global installs of create-react-app are no longer supported. For solving this problem, run these command respectively:

npm uninstall -g create-react-app

Then install create-react-app in this way

npm install create-react-app

Then create your react app

npx create-react-app my-app