Yes, as long as you have the required TIDAL subscription, you will be able to stream TIDAL's Hi-Res FLAC files at their highest resolution on the Stream Magic 6 V2 via TIDAL Connect and TIDAL's StreamMagic app integration.
Please note you will need to ensure that your unit is running Service Pack version 022-a-147 or later to enable TIDAL Hi-Res FLAC compatibility, and you will need to be running StreamMagic app version 2.14.1 or later to stream Hi-Res FLAC files via TIDAL's StreamMagic app integration.