João Carmo Pereira

This plugin will add a new copy to clipboard functionality to Gutenberg Code Block. 
It will add a copy button at the top right corner of the block. After clicked, it will select the text, copy to clipboard, and after copy it will deselect the copied text. No markup here.
This plugin makes use of two javascript libraries: 
Clipboard.js and Prism.js

Carmo Copy to Clipboard

This plugin will add a new copy to clipboard functionality to Gutenberg Code Block.

Liton Arefin

Copy To Clipboard is a WordPress plugin that makes it simple to copy & paste text, paragraphs, blockquotes, coupons codes and source codes from your WP website with a single click. It’s an efficient way to save effort and time while navigating through your WordPress site content.
Copy To Clipboard plugin add a copy button to any text, paragraph, blockquote, or coupon on your WordPress website. Once a user clicks on the copy button, the text is automatically copied to their clipboard, making it easy for them to share the content with others.
The plugin is fully customizable, allowing you to change the button text, button style, and button position to match your website’s branding and design. You can also choose whether to include a tooltip or not, which will provide users with a message once they copy the text.
Copy To Clipboard is perfect for bloggers, marketers, and website owners who want to make it easy for their users to share content. Whether you’re sharing a discount code, a product description, or a quote, this plugin will help you streamline the sharing process and improve the user experience on your website.

Copy to Clipboard

Copy to Clipboard WordPress plugin helps you to copy anything to clipboard from your landing page.

Carmo Copy to Clipboard vs Copy to Clipboard