Create multiple pdfs from folders

You can use this (paid-for) script for Acrobat I've created to do just that:

https://www.try67.com/tool/acrobat-batch-combine-all-pdf-files-in-a-folder

As mentioned, you will need to do it in two parts: First, run an Action on all the files. Then click a button to run the script that merges them by folder.

You can use a custom script in an action and the doc.insertPages method.  It's not as straightforward as it sounds because the action does something to each PDF in the directory and sub directories so you'll need to write a script that creates a document in each folder, names it the same as the folder, inserts the pages of all other PDFs in the folder, then deletes the first page when completed.  You'll need some scripting that runs at the beginning but not for every document.  This should help:

https://pdfautomationstation.substack.com/p/how-it-solved-the-acrobat-popup-dialogaction

If you need a professional to develop this for you, send me a private message by clicking my icon.