Allow Bricks Templates to be selectable in Gutenberg editor

Suddenly, something came across my mind.

I know that I can create different templates for different blog posts and assign the templates to blog posts based on post IDs, Category and other conditions).

But what if I want to do the other way round?

I want to create a few templates, then I can choose the template in the Gutenberg Editor when I am writing a post. I want some posts to use different templates (not based on categories). I don’t want to assign the template from the Bricks builder. So, choosing the Bricks templates from Gutenberg will be handy.

I don’t want any 3rd party addons (if it’s already available in the market) for this.

What is your thoughts?