Need Help to stream DSD to SD3100HV

one possibility, I see that the sd3100hv is not currently listed as either a roon ready or a roon tested device:

https://roonlabs.com/partners/t_a

searching the roon community i found this dec-2019 post from roon support staff that indicates it is possible that for this reason roon will not pass DSD content to such devices:

this might be something to investigate and/or contact t+a support for more information