Recursive coordinated read?

When dragging a folder from files.app into my app (or selecting it using a UIDocumentPickerViewController), I want to download all the files and subfolders in that folder. How is that possible? With a coordinated read of that folder's URL, I only get a single URL with tons of e.g. "*.icloud" files within. Am I supposed to construct URLs to these and feed them into another coordinated read or is there a more straighforward way?