Does Puzzle Quest on PlayStation 4 include the "Revenge of the Plague Lord" expansion?

I really loved playing Puzzle Quest back when it was released, and noticed that the PlayStation 4 version was on sale this week so was considering re-buying it.

There was an expansion made for the game called "Revenge of the Plague Lord" that was released as DLC for some platforms, and bundled with the main game on others.

I couldn't see any reference to the expansion in the description on the store, and it isn't listed as DLC either. So is it being sold as part of the base game, or is it simply not available?