I used to wonder why there was no Grape Ice Cream. Later on, I figured it was because Grape is usually an intense, concentrated kind of flavor, which would be hard to mass reproduce, w/o driving up costs.
Grape, or at least the most commercially used type, Concord grape is better suited for one of those European Gelatos, or an addition to Greek Yogurts.
I can recall only one high quality soda beverage using that flavor;
NuGrape was the one. Most other food products using grape flavor, end up tasting like some version of Tootsie-Pop Suckers. The kind you saw The Old Wise Owl crunching down on, in that cartoon commercial.
In Mississippi, we had a regional Grape soda named ‘Grapette’. It was carbonated and tasted great. It’s still available in some parts of The South.
https://en.wikipedia.org/wiki/Grapette