Note: The plugin, like WordPress, requires a minimum 5.5 PHP version.
To receive automatic updates just install and configure the Envato updater plugin: httpss://goo.gl/pkJS33 .The official guide that explains how to configure it can be found in the following link: httpss://envato.com/market-plugin .
Through the main Custom JS & CSS you will be able to create Code objects by which you can define the:
Code can be included by directly editing any page, post or custom post (like WooCommerce products, BuddyPress, etc.). You will find the Custom JS & CSSmetaboxes that allow you to embed the code you need!