as far as I can tell, .yxdb files are not ingestible into PowerBI.
what are you referring to when you say field descriptions? Currently we output to csv for ingestion into powerBI, because the PowerBI output doesn't preserve data type. I'm not really clear on what you mean by field descriptions.
@craigedelman, are the field descriptions in your current Alteryx flow still visible? Meaning you haven't made any changes to them while running the flow? I don't think you can upload an Alteryx flow into Power BI directly.