Your mother's PD is not current, so your CSPA age can not be determined at this time.
The US Government will ONLY do the CSPA calculations AFTER the PD becomes current. The LAW requires this.
Right now, the US Government can not determine your CSPA age so that is why you are not eligible under CSPA. The US Government can only calculate to determine if you are eligible for CSPA relief ONLY AFTER your mother's PD becomes current.
Wait for your parents' interview. This is where your parents would make the case for you as a derivative beneficiary.
