Shoto doesn't think much of it. He doesn't think much of anything but it does look like Izuku had a plan in mind. Not eating is not good, breakfast is important, but he looks at some of the larger chunks of rocks and then back at his friend. "Toge left, so I was awake, then I heard this."

Which he turns his head toward Izuku and asks the question he may be should've asked: "What is it you're doing? Do you need help?"