About the Tangible Blocks category

All about Tangible Blocks

Where can I find out more about setting up the Block Category for Gutenberg and Elementor?

The documentation says
To create a block, go to the admin menu Tangible → Blocks, and click “Add New”.

But there is no block post type under Tangibles, only Templates, Styles, Scripts & Layouts.

Any guidance is appreciated. Cannot find any relevant documentation.