@glennewdick Thanks, I appreciate the response. I did contact McIntosh and below was their response:
We do not believe that Tidal offers DSSD streaming as these files, especially DSD256 are very large.
Your Roon Nucleus may have been converting music files to DSD output. The MA8900 will certainly play native DSD files over the USB input with resolutions up to DSD256.
MA8900 does not data rate covert to DSD. The display on the front of the MA8900 shows the INCOMING signal characteristics only.