Thanks for taking the time to respond... appreciate it.
I double-checked but I had set the Mytek's MQA decoding correctly. So that wasn't it.
But I did figure it out last night. When I installed the Mytek, I switched around the Node 2 and the NAD-M32. I wanted to rename them in the BluOS app to reflect the change. This is where I think things went haywire. Long story short is that I don't think they were set-up properly after I moved them around and tried to change few things in their settings (including disabling MQA decoding on the Node 2).
I went back in and decided to just reset both to factory settings and set them up from scratch. That seemed to help as the Mytek started giving me different displays about the digital stream than just 16-44.
One last tweak, almost accidental, brought out the MQA display on the Mytek. For some reason, you have to have the volume of the Node 2 turned all the way up to it's max setting through the iOS app, otherwise the Mytek shows PCM and relatively higher sampling and bit rates (e.g., 24-98). But with the volume maxed on the Node 2, I got full MQA decoding while steaming Tidal Masters. Problem solved!
I think the Node 2 allows you to set fixed volume and this might also work but I like having the option of adjusting the volume through the app.
Thanks again for your suggestion.