I’ve been trying various options, but it doesn’t look like this can be done without modifying the theme template file(s). You would have to create a child theme where you could then customize that part of the post template file to insert the shortcode. A child theme allows your parent theme (Prologe) to be updated without losing whatever changes you make.
Have you used (or use) a theme that lets you show what you have, or want to have, in any location other than a sidebar?
What you want to do is very unique and specific to your needs; making a theme update to accommodate this capability is a bit more complex as it needs to work for everyone else using this theme. Hence, being unique and specific, this could be done but requires a customized theme (child theme). **I’m not sure if you are familiar with child themes?