Facebook Comments dynamic page

I want to implement Facebook Comments in my Wordpress Post. According to the following docs, we only have to add the following code:

Code in head:

<div id="fb-root"></div>
<script async defer crossorigin="anonymous" src="https://connect.facebook.net/en_GB/sdk.js#xfbml=1&version=v11.0&appId=some-id&autoLogAppEvents=1" nonce="L9lCjtL2"></script>

Code in body:

<div class="fb-comments" data-href="https://superpoll.org" data-width="100%" data-numposts="5"></div>

How do I change the https://superpoll.org into post URL permalink so the Facebook comments would display different comments for each post?

Any help would be very much appreciated.