https://mythemeshop.com/kb/create-a-custom-shortcode-with-wp-shortcode-pro/
Create a Custom Shortcode with WP Shortcode Pro - MyThemeShop Knowledge Base
May 7, 2018 - In this tutorial, we are going to discuss one of the unique and most powerful features of WP Shortcode Pro.
custom shortcodecreatewppro
https://torquemag.io/2017/06/custom-shortcode/
Beginner’s Guide to Writing Custom Shortcode for WordPress
May 12, 2021 - Our beginners guide will teach you all about WordPress shortcode, the API and how to create your own custom shortcode in only 3 simple steps.
custom shortcodeguidewriting