How is ESLint integrated into Create React App?

When I run npx create-react-app some-name, a bare-bones React project is created for me.When I then peek into package.json, there seems to be some evidence of ESLint being present, as there is this:

"eslintConfig": {"extends": "react-app"},

Usually, when I install ESLint as a dev dependency and configure it, VS Code picks it up.In this case, VS Code does not seem to recognize that there is any kind of linter present/configured.This is not super surprising, as ESLint is not a dependency of the React project I just generated -- at least not according to package.json.
When I try to run eslint . within the project's root directory, it says "command not found".

I tried to breathe life into this ESLint configuration by expanding it, so now I have this:

"eslintConfig": {"extends": ["react-app", "eslint:recommended", "google"],"rules": {"semi": ["error", "always"],"quotes": ["error", "double"]   }},

This changes nothing.I manipulated the source code in a way that I know violates the above configuration, yet, I have not been signaled any wrongdoing.

This leads me to a simple question:Do projects generated by create-react-app come with some kind of ESLint configuration, and, if so, how do I enable and extend it correctly?

As I am being referred to the number one Google hit that comes up when searching "create react app eslint" -- which I have read -- let me clarify what I mean:

ESLint is obviously integrated into Create React App in a different way than it would be if it had been manually added to the project like so.This is not only evident by the sheer number of people who post about their struggles of getting the two to work together.
This is also evident as …

• … one cannot run the eslint command in the project root.
• … ESLint does not seem to be a dependency within package.json.
• … VS Code doesn't pick up that there is ESLint present.
• … there is no .eslintrc.* file in the project root.

So: How do I go about ESLint in the context of Create React App? For starters: How do I run it? How do I expand it? And why does VS Code not pick it up -- even though it usually notices the presence of ESLint?