What’s the name of a Netflix series

It’s a Netflix series. I don’t know any information about the actors, the genre etc. I do only remember one scene. There was a boy approximately of a school age. He asked his father or brother or just a guard (I’m not sure if their family relations) “what’s for tea?” And the adult answered “pizza”.
The boy was dressed in grey. Maybe it was a school uniform.
One more detail. When the adult answered, he was on his way to somewhere.
So, if you’ve seen anything similar to this, please share your ideas.