The door is pre-made. I don't think they would put paint on it.
But anyway repaint door is easy. So you could let they paint the whole thing. If you don't like the color of doors, repaint them yourself.
Thank you very much for both of you replied so quickly!
Builder said the door are primed, ready to be painted but they still need to be painted (difficult to understand). I think we will ask to have the eggshell for whole thing and will see ...