I have a folder named "RFI" Inside that folder is a bunch of PDF's. I want to use PowerBI to pull a list from the names of the PDFS. The PDF's are from Bluebeam and many of them are full of METADATA (TAGS). I would love to pull that information as well.
You should be able to follow steps in this article to use Power BI Desktop to pull a list of the PDF names from your SharePoint Folder.
However, I don't think there is currently a way to import PDF data directly into Power BI. Here is the idea shared on Power BI Ideas. You can vote it up and add your comments there to improve Power BI on this feature.