Hello, I'm rather late to the party but I actually don't think any of them are opaline
Mum has very heavy melanin causing the flecking and dark barring but if she were an opaline, her wings would have the white "bar" which indicates opaline and her saddle would be spotted, not striped.
I can't tell if Dad is opaline but I don't think he is, either, although it is hard to tell since he's dominant pied.
Chick is definitely not opaline either, he is just spangle, as mentioned
In the updated pictures:
The first one looks like a sky blue goldenface greywing
Second one is a light green sf violet opaline clearflight pied? Not sure on this one, J.W or Aluz?
And the last little boy looks like a recessive pied skyblue spangle goldenface. Not 100% sure on this one either.
They're all beautiful!