Hi Mayukh,
I am not an expert on Raspi or DACs (or most things

)But I will try to explain.
The Swara DAC can be connected to your network and controlled from your smartphone or iPad or computer.
The Swara needs to be connected either through a wired connection or wirelessly using a very inexpensive wifi dongle (@Rs.500)
The DAC comes with Runeaudio software installed but I understand there are others like Moode and Volumio software that can also be installed. Each of these have their unique features.
Runeaudio has Spotify in the home screen (you need to sign in with your details-paid or free account) I have not used Tidal, but I think apart from requiring a subscription this needs some workaround.
I hope I have been able to answer some of your questions.
PS: I have recently upgraded my DAC and streamer.