Export gutenberg blocks to CSV

Hi,

I am working on a clients sites and they have a series of pages (over 300) but I have re-created the setup of the site so these pages are going to be custom post types instead.

So I need to create all the pages as custom post types so I can import a spreadsheet in to create the custom posts however my issue is all the pages are built using Gutenberg blocks so I need a way to export all the pages but with the data from the individual blocks too. My ideal scenario is each block’s data is in its own column in the .csv export.

So where there is a block on these pages, it will be entered into a custom field on the CPT.

Is it possible to do this (or anything near) at all? If not within WordPress/Gutenberg is it likely there is any plugin available to help me with this?

Thanks
John