Lead Developer
I’ve made it so shortcodes are rendered in the live preview for the next version.
However, the syntax of the shortcodes in your initial post is really weird, so I’m not sure if it will work.
I’m not sure sure what you mean by block changes in the Customizer? You can add your own copyright message with whatever content you want using a function like this: https://generatepress.com/knowledgebase/changing-the-copyright/