Roon does not use metadata tags to recognize Tidal MQA streams. That is accomplished through MQA in band signaling.
Even if a 16 bit MQA stream is unlabeled as such, Roon will identify as MQA. A 24 bit MQA stream unlabeled and truncated to 16 bit, Roon still may recognize as MQA – that depends on the validity of the 16th LSB.
AJ