New to Hi Fi streaming, help

[sebak]

Edit: I think my original post was too long so will try simpler shorter question

 

Hi all, I am wondering if streaming Tidal through Chromecast Audio will pass through an unaltered signal to a DAC through TOSLINK.  Chromecast specs state support for hi res streams at 24bit/96khz and Tidal page states MQA streaming at 24bit/96khz so on the surface this seems like an adequate way to get tidal Hifi to my stereo, or am I missing something?