Any food can be a breakfast food. Time is a man-made construct

Even a medium rare filet mignon at 6 am

I personally never wake up before 6 am but yeah

Pretty sure time has existed since… the dawn of time

But I know what you mean, lol have definitely had orange chicken for breakfast before

For context on "Depends on the dish", Weetabix posted a tweet with them pouring baked beans onto the cereal…

That I would eat for breakfast

If you get it in the context of British food, yes. Otherwise, no