I followed all steps mentioned in these top-voted answers:
This is a sample code in my base.html
template in my Django Application deployed on Heroku:
<meta property="og:site_name" content="Website Name">
<meta property="og:title" content="Website Name"/>
<meta property="og:url" content="https://my-app-name.herokuapp.com/"/>
<meta property="og:image:secure_url" itemprop="image" content="https://i.ibb.co/ZXV6r3Z/logo-large.png">
<meta property="og:description" content="Website Description">
<meta property="og:type" content="website" />
<meta name="author" content="Author name">
From the browser Inspector I have confirmed that these tags are being loaded in the DOM but still no image thumbnail for my website URL appears in Whatsapp. Please help me solve the problem.