October 1st 2023 both the wife and son were approved for their green cards! Granted it is conditional because it's been less than 2 years, but it is still exciting. There was no interview. I literally think it hinged on the son's medical.
Everything was completed (including medical) and USCIS confirmed receipt of the evidence (local office in Houston) yesterday (Tuesday 22 Aug). So we will keep an eye out on the son's status since it's linked to my account. I will keep you all updated.