It is not a given that a device will support native DSD on Linux. Each Linux kernel needs to be patched for the specific device, if it can. On other threads, it was specified that the 200m was NOT in any of the Linux kernel patches. DoP is the same as native DSD, just not at the full resolution.
You should contact Sonore and see if they can add the device to their kernel running on the Rendu.
Alternately, If you want DSD512, then you will probably need to setup a Windows machine, run roonbridge to make it a Roon Endpoint and run the Cambridge Audio Windows Drivers. MacOS has the same limitations as Linux.