How can I view how much I've consumed and the goal amount instead of how much left I have to consume?

Yes. In Foodnoms settings, select Goals, then look for the Format As setting.

This controls how goal values are displayed throughout the app: either how much you have left (for example, "1,100 remaining") or how much you've consumed against your goal (for example, "900 / 2,000").

The setting applies to the goal cards on the Food Log tab, widgets, and the Apple Watch app.