I found what’s think you are referring to, and since they list it as “red wine”, they don’t say what varieties of grapes they use.
Also saw this: Our red wines run the spectrum from bone dry to very sweet. We use vinifera, French hybrid, and American varietal grapes, and American oak barrels. We craft modern takes on old-school classics.
The reviews say that it is a sweet wine, so probably a good dose of residual sugar.