We've been helping lots of folk recently to build Flow's which extract SharePoint list item attachments and perform some form of processing, typically to convert to a single PDF document and share with a third party, or add to a records repository.
The following tutorial is built around a very simple scenario but should serve as a good guide for:
- How to extract ‘X’ number of SharePoint list item attachments and process
- How to use Flow variables to iteratively build a JSON array
- How to merge 'X' number of documents (any format) into a single PDF document
- How to dynamically create a HTML fragment and insert into a PDF document
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