Thanks for refreshing my memory about your case, providing the background story when asking questions helps. It may seem like I have the memory of an elephant and I remember everything about everyone's case, the truth is I don't
. To your questions:
1. No it is not okay for him to not have a bio appointment. He will not be getting a GC if he does not complete the bio portion of the process.
2. Yes, you need to follow up with USCIS to find out about his bio appointment. You can contact EMMA online to try and find out about this or call the 1800.