Nikolay Bachiyski

In WordPress you can set individual templates for pages, which allows you to easily include additional functionality. Unfortunately this feature is not available for posts. Here is where this plugin comes.
After installtion you will be able to choose a template for each post the same way you do with pages.
You can find <a href="https://codex.wordpress.org/Pages#Creating_Your_Own_Page_Templates" rel="nofollow ugc">how to your own templates</a> in the Codex.

Templates for Posts

The same as page templates, but for posts.

envato

A Template Kit is a collection of pre-designed starter templates for a WordPress Site Builder that share a cohesive visual style.
You can use this plugin to Import Template kits for Elementor.
Once this plugin is activated go to “Tools” > “Template Kit” to begin importing.

Template Kit – Import

Use this plugin to import Template Kits to WordPress

Templates for Posts vs Template Kit – Import