yield hashes

components.parent-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>

<ParentComponent as |c|>
	a: {{c.a}}<br>
  b: {{c.b}}<br>
  
  c: {{c.c}}<br>
  d: {{c.d}}
</ParentComponent>

<br>
<br>

templates.components.parent-component.hbs

{{yield
	(hash
  	a=1
    b=2
  )
  (hash
    c=3
    d=4
  )
}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}