Check specific resort eateries that you've an interest in to be sure. You can find hours of operation (and meals) at the disney website and prolly allears.net too.
We've eaten at AOA at that time. They usually still have a couple of areas that have breakfast but also offer lunch at a few as well. So, a good time to go to pleas all!!
Disney has it but makes you work extra for the knowledge. When you put in for an ADR you can learn the times of various meals at a specific place by putting in the name of the meal as opposed to the time you want. Glad you could find it easier at allears.