If it’s not showing in MacOS either, then its not specifically a Roon issue. You could check if it’s detected in System Information > USB, or try Schiit support?
No,
The DAC works on the previous version of Catalina but can’t be find in 10.15.4
Not visible in System info or Audio devices in Audio Midi.
Just talked to Apple-they are not aware of a problem.
Just contacted Schiit for updated driver, if any.
Looks like I can downgrade to older Catalina version or wait for new update on Catalina.