Export raw files?

yes you can only download one image at a time from the web browser version and it losses all settings which is of limited value... you do this from the edit image ui

however the point is that the images sync so you can open Lightroom on a computer and download | save as many images as you want... pick the file type and settings as a per-save

Only one at a time I think. Plus when I tried the XMP settings didn't get exported.