Musical Fidelity make quite a few DAC’s, which model/version are you using?
Can you check its specification to find out what the highest sample rate it supports over USB?
Looking at the MF site I can see that some of their DAC’s support up to 192kHz, whilst others are only 96kHz.
Oh yes, I had Roon for a few days only, so this must be the first time I play a 192 kHz song over the laptop with my Musical Fidelity V90-HPA, which is a DAC and head phone amplifier - and that is 24-bit/96 kHz only.
I have played the same music directly from the Mac Mini, but that is connected to my HiFi system - NuPrime DAC9/STA9 and that is another matter.