This post has disabled output of Featured image in the Post settings. But you can use also pages for such purpose

You can add some content for the title area in Post Excerpt panel which you can find in right blocks of post

You can add rh_side_contents shortcode as sticky widget. Check documentation about auto contents shortcodes

All these Blocks are added via Elementor in Frontend Editing. You can add such blocks manually or import Data from Products (just type name of product which ...