Extracting polyfills CRA dependencies

[Facj]

I have used wepack-license-plugin to extract the license of an Ionic React app built with create-react-app.
I have realized that the output does not include any polyfills-related package. Polyfills are mentioned in CRA issues as injected in the bundle (1, 2).

Is it possible that polyfills packages are actuall included and not detected by webpack-license-plugin?

These are my package.json file and the output of the webpack-license-plugin:
package.json
thirdPartyNotice.json

This is my craco.config.js:

const LicensePlugin = require("webpack-license-plugin");

module.exports = {
  webpack: {
    plugins: [new LicensePlugin({ outputFilename: "thirdPartyNotice.json" })]
  }
};