I provide morning and afternoon snack and a hot lunch. I open at 7:30 so the parents know that I expect the children to have eaten breakfast at home before arriving. We have morning snack at 9 am.
I do provide a hot lunch but I do not cater to allergies or religious beliefs around food, otherwise I’d be a short order cook. They know that if the child needs exceptions to my menu, then the parent is expected to supply it. That can become very costly and time consuming for the provider to cater to everyone’s individual exceptions to the menu.
I don’t think there’s a need for breakfast and morning snack unless you open at 6-630am.
I would think that parents expect lunch and 2 snacks to be provided.
That is the expectation in my area, but the norms may be different where you live.