1, 2, 3 are male
4, 5, 6 are female
7 is male
8, 9, 11 are not feather sexable
10 has clear crescents on the face and some spots on the chest, so I'm leaning towards female, but am not 100% sure.
You could try adding a shot glass filled with water to the incubator. That adds some humidity but has a small enough surface area that it doesn't add much.
30-35% is probably about ideal. I've found that up here at higher elevations lower humidity during incubation is better, but higher at lockdown (up to 65-70%).
When I lived in P-town my ideal was around 30% humidity during incubation and up to 50-60% was best at lockdown.
It's possible that they're siblings, but as long as there are no genetic defects hiding in there, they will still be fine for a few generations, at least. It won't hurt to add some new genes, though.
30% protein is good. You may want to check methionine and lysine content as well, but that sounds good.
Is the chick eating yet? Do you have pictures?
Edit: I am interested to know the brand of the feed. Purina is usually the only feed I can find with 30% protein, but it makes the chicks'...
I would definitely find out. I have seen "quail" feeds with as low as 7% protein, which is far, far below what they need. The first weeks of nutrition are critical for proper growth and development.
This article will tell you what you're looking for in feed...
I only see three birds in each picture, and the only one that looks like a standard pharaoh (wild) is the top one in the second picture.
I don't think the other two are Italians either.
Have you ever had quail before? If not, I recommend starting with the articles here and then asking any...
Try boiling an egg and crushing the yolk to feed it first. Sugar may give an energy boost, but does not contain any vitamins to help the chick.
What is the nutrition information (or brand and name) on the food that your giving it?
Is the food crushed small enough for the chick to eat?
Just because they're related to you doesn't mean that you have to spend time with them, though. I haven't seen my brother in person in over 35 years. I saw him briefly on a zoom call when my aunt passed away, but didn't talk to him.