The few things that stuck out to me here are:
▪︎OP said she didn't put her daughter's pizza on a plate because her daughter didn't ask her to.
Does this mean, OP, that perhaps like your daughter, you need specific instructions or direct communication inorder to do things? Or were you testing her to see if she can 'use her words' instead of expecting you to read her mind?
▪︎You spent time with her afterwards, before she went to bed but didn't talk about food.
Was it because you felt uncomfortable to talk about this? Or you didn't want to rock the boat so didn't want to bring it up unless she specifically does (again with the direct communication where if she doesn't say anything, you wouldn't either as if you dont know what to do unless it's explicitly stated)? Did your daughter not mention that she's hungry and did you not ask her?
Interestingly both of you seem to be similar in at least these 2 areas with direct communication and avoidance of (perceived) difficult things. I suspect that you too may be on the spectrum as your daughter (even if neither of you is autistic, etc).
That said, I think you'd need to be more proactive with asking her questions in order to either get to the why or get a positive outcome, like her eating and not going to bed hungry: Like would she like to take out a plate and put food out for herself or would she like you to? Is she hungry and why didn't she eat? Things like that.