score:4
If you don't mind me referencing Rashi, a French Medieval rabbi, his understanding of Genesis 1:30 makes note that both humans and animals were on the same footing with regard to food.
Nothing is explicitly stated about how both humans and animals before the fall would otherwise acquire their nutrients, i.e., if humans were omnivores and if carnivores were carnivorous. After the flood, God permits humans to eat all living things, which includes meats. (Gen. 9:3)
It's worth noting in Genesis 4 that animal offerings were a thing and after the fall, Adam and Eve were given clothing from animals. In any case, whether or not carnivores were carnivorous is speculative as the text isn't explicit.