The iPad can only be used as a Roon remote device right now however, you should be able to install Roon on the Samsung and then use that as both a remote and an audio output (provided it is connected via WiFi to the same LAN that the Roon Core is running on).
Have you tried installing Roon on the Samsung yet?
I have Roon as remote on the S6. In settings - audio it says " connected to this phone" and its default output. When I enable it starts playing in my basement. Not in my phone. I noticed at the bottom of the screen it plays through my Primare Wasapi output. Which is the same that I use on my core when listening in the basement. Should I disable the output Primare DAC audio Wasapi?