Not really.

GasBuddy has a standard: price per gallon

But this is just a map of the lower-priced items, which are available everywhere. You can find a cheap sandwich, bowl of soup, slice of pizza, or taco virtually anywhere. There is no corresponding standard point of comparison (no "gallon").

There's the calorie. Not always a good metric of health, but it's still a signal.

$/cal varies meaningfully between home cooking, Costco, Chipotle, fast casual, sit-down, frozen meals, etc.