Apologies, that was a hasty post.
I was echoing the comment from @Paul_Danyliuk, especially
As of Feb 2021, you cannot reference data from the canvas (i.e. you cannot reference the text that you type in a page). Maybe Coda adds this capability in the future. At the moment, you can only reference data from tables.
For me, I would like to reference blocks of text, similar to ‘block reference’ in roamresearch.
And ‘transclusion’ in MediaWiki, I previously created a related forum post.
In general, would be great if everything created everywhere was reusable/referenceable. Ideally with ability to add labels or ids. For example, could add an id and labels to sentences, paragraphs etc. Without having to define them within formulas.