Unable to polyfill Object.fromEntries in Ember

I have a simple Ember app and I need to polyfill Object.fromEntries in a component.

For reference, I use Safari 12.1.1 that supports fromEntries natively and Safari 11.1.1 that does not.

AFAIK, all I should need is a proper ember-cli-build.js config.

I would appreciate it if someone could tell me why the following tweaks do not properly polyfill the function:

const app = new EmberApp(defaults, {

  'ember-cli-babel': {
    // supposedly should inject core-js/stable into app
    // @see https://github.com/babel/ember-cli-babel#polyfill
    includePolyfill: true,
  },

  babel: {
    // should replace injected core-js/stable with imports
    // that are not natively supported by config/targets.js
    // @see https://babeljs.io/docs/en/babel-preset-env#usebuiltins-entry
    useBuiltIns: 'entry',

    // explicitly use corejs v3 per babel-preset-env docs
    corejs: 3,

    // force inclusion of fromEntries regardless of config/targets.js
    include: [
      'es.object.from-entries',
    ],
  },

  //...
});

I can see it's there: https://github.com/babel/babel/blob/v7.5.5/packages/babel-preset-env/src/polyfills/corejs3/built-in-definitions.js#L265

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Package versions:

• ember-source@3.7.2
• ember-cli@3.5.0
• ember-cli-babel@7.5.0
• @babel/core@7.5.5
• core-js@3.2.1