WordPress Monsters

You can create templates (layout) for your pages to add some blocks of content before/after general content.
Also you can assign your template to custom post type(archive or single), taxonomies, 404 and search results pages, this options can be found in Templates->Settings menu in admin console.
You should use
<pre><code>[wpm-template-content]
</code></pre>
shortcode in this templates to separate content.
Watch how to use Template Manager plugin in this cute short video:
<iframe loading="lazy" title="Template Manager by WordPress Monsters" width="750" height="422" src="https://www.youtube.com/embed/jY2T-ZuUfSE?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

Template Manager by WordPress Monsters

This is a temlate manager plugin for easy WordPress development from scratch when you are use Page Builders plugins.

mdburnette

Adds a number of additional custom shape divider options for Elementor.

Shape Dividers Plus for Elementor

Adds a number of additional custom shape divider options for Elementor.

Template Manager by WordPress Monsters vs Shape Dividers Plus for Elementor