Where to access Black Layouts?

I’m an early adaptor of Gutenberg and want to give this plugin a try since I like its concept. I create a couple test layouts under the custom post created by this plugin. Accordingly to instruction: “The Layouts will be accessible though a Gutenberg block called Blocks Layout,” I can’t find “Blocks Layout” anywhere under Gutenberg editor block list after searching for it high and low. I have do disable the plugin and move on with my project for now under with my tight deadline.

Thank you.