What do you mean by “get blue input source”?
The mojo doesn’t support MQA so you’ll only be able to get the first unfold if it’s done by Roon or Tidal app. But that should get you yellow (88.2) or green (96) on the mojo as MQA will unfold to X2 sampling rate (from 44.1 or 48).
Do you have “MQA core decoder” enabled in Roon audio settings?
Sounds strange, if you have the Tidal app streaming quality set to “Master”, a 24-192 MQA track will be unfolded to 96 by the app. When it hits the mojo it won’t be able to do the final rendering to 192 because it’s not a MQA certified DAC, thus playing it as 96 (green).
Unless something’s going on in your phone (upsampling) I don’t see how you can get blue light on the mojo. I’m an iPhone user myself so can’t say how Android’s working in this case.
You should have the same result in Roon if MQA core decoder is enabled and no upsampling occurring. The MQA core decoder can be enabled/disabled under Settings, audio, device settings (the mojo) advanced.