Thanks @spinaltap. Yeah, the 210 is decoding an "MQA Studio 192k" stream (i.e the encoded master’s original sample rate was 192k), but it will only be decoding to 2x MQA Core (96k).
Rendering only happens in DACs (and the 210 is limited to 96k on its outputs, though that is moot in this instance).
An MQA renderer (standalone DAC or MQA-rendering DSP loudspeakers) is needed on the end of the 210 to process the decoded MQA further. In a non-MQA DAC or non-MQA DSP loudspeakers, you get 88.2 or 96k first-unfold MQA.