For some reason, the Featured Image box is not showing. I checked under the screen options and it is not showing. Since it is an MU site, I even checked under the main dashboard and still, I'm not seeing that option. I also checked for the setting under the settings and I don't still see the option.
Here is what I have: WPBakery Page Builder as the main editor and my current version of Wordpress is 5.1.1 .
Thank you, Kevin