Wow, and all those were hatched from that one hen's eggs?
Yes, she probably did lay all the eggs those chicks hatched from. That hen has a lot of recessive genes, which allows the father's contribution to be more obvious in this set of chicks.
the father is a Cuckoo Orpington x Light Sussex.
That heritage gives him an impressive collection of gene variatns to pass on to his chicks!
A few of the ones I see most obviously:
He's got the genes for white barring, and for not-barred.
He's got the genes for black-all-over chickens, and for chickens that can show other colors.
He's got both the silver and the gold genes.
Just those genes are enough to cause:
--black chicks
--black chicks with white barring
--gold & black chicks (or red & black)
--gold & black chicks with white barring (or red & black with white barring)
--silver & black chicks
--silver & black chicks with white barring
I think there are a few other genes involved in a few of the colors too.
For each of those genes, the hen has the recessive trait, and the rooster shows the dominant trait but also carries the recessive one. So some chicks inherit the recessive from both parents and show it, while some chicks inherit the recessive from their mother and the dominant trait from their father which means they show the dominant one.
(I am leaving out quite a few details, trying to give the basic idea without getting too confusing.)