Cambridge Audio CXN V2 streamer features Chromecast input.
+1 on this.
If I understand the OP correctly, they only want to cast from the official Tidal app rather than any 3rd party app or streaming set up.
They are therefore limited to devices that either are Google devices (I see Chromecast Audio mentioned earlier on but any of the Google Home stuff will work, though not from a hi-fi perspective), devices marked as Chromecast/ Google Cast enabled (like the CXN V2 above) OR lets not forget Apple Airplay- which opens up another raft of devices.
A convoluted solution would be to cast to a Smart TV or one equipped with a (video) Chromecast stick then use TV outputs to ones DAC/ amp. But this is clunky and will involve resampling etc. (EDIT- just seen you don't have a TV)
What's your objections to using other streaming set ups OP
@day7a1 ? Blusound for example? The Tidal content is the same, access to your favourites, etc- just not the Tidal app layout. Never bothered me, in fact I try and avoid the actual Tidal app!