Hanabi: Did you not? (And yet, the onigiri’s there)
Could it be
You did it, didn’t you?
Hinata: W-we didn’t… Did you see with your Byakugan?!
Hanabi: I didn’t even see it.
You did do the thing I asked about, didn’t you?
Hinata: … ~~
Hanabi: It’d be nice if he ate well today too, eh?