I see them.
From the pics it doesn't at the moment look as though their kok is developing. This is dependent on a few things but more so their genes than anything. Since it's nearly impossible to know what some of the genetic background is on some of these fish you will probably have to give it more time.
But they are young, and good quality food an living conditions will help more then anything.
I would get them som high protein based foods designed for flowerhorns and kok growth, if that is what you are looking for.