title: Xamarin Forms Previewer is missing
body: <p><img src="https://i.stack.imgur.com/gZ9kc.jpg" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/9zgVR.jpg" alt="enter image description here" /></p>
  <p>The issue occurred on Visual Studio Community 2019 version 16.9.1.</p>
  <p>The VS version mentioned above was just downloaded. I am trying to develop a mobile app, but the Xamarin Forms Previewer is missing and I can not enable it from the Option Tools.</p>
  <p>For more information, please see the attached files.</p>
  <p>Can you help me with a solution?
  Thank you in advance!</p>