Hello,
There are no subdecks in V12. See this post for more information: Why are there no subdecks in the AnKing V12 deck?
The deck is massive and tags are a more appropriate way to get through the deck.
You can unsuspend cards by following this method: 🤝 Subscribing to a Deck
Or you can create custom filtered decks, see this video on how to do this: https://www.youtube.com/watch?v=l1v1TqRTUUE&t=0s
You can find the original subdecks by going to #AK_Original_Decks tag
