Featured Image not showing in posts or on posts page

Hello,

So I’m pretty new to wordpress and my site is in-progress. I was trying to make the posts page with elementor and the featured image doesn’t show on either the post page or as a thumbnail on the blog posts page. I was following this tutorial:

https://livingwithpixels.com/resources/healthy-blog-tutorial/ Not sure if that’s relevant but here it is just in case.

Thanks in advance!

The page I need help with: [log in to see the link]