Update: GWENT: Rogue Mage has released! Discussion may continue in the news thread. Also see the dedicated website, which includes an FAQ, here.
Did you log in to the game on Android with your gwent credentials? Sounds like that's required to link things up so you get goodies, based on the FAQ on the new game page: https://www.playgwent.com/en/rogue-mageBought digital deluxe edition on android, but didn't get the goodies for gwent