I believe it is possible to have DNG files the contain RAW Camera data and DNG File that contain RGB Images converted from Camera RAW Data. I believe the second screen capture you show has that type of DNG file open in ACR so ACR Raw DATA features are not available for there is no Camera data there is RGB image in the File like Jpeg and Tiff files open in ACR. RAW Options are not available. I would Also think a Panorama ACR makes from stitching RAW image files and saves into a DNG file would also have RGB image not RAW camera data, How would you be able to stitch a mosaic raw image. How could Topaz De Noise remove noise from a mosaic RAW image.
JJMack