1) Is your dad PA or mom? If dad then provide your adhar card, school certificates even if those only have dad’s name. You can send OCI also.
If your mom is PA then attach all the proofs that show her name and you may write an explanation.
2) My friend got the same request on Jan 20th (and They never got a first request for this, they only got one on Jan 20th saying, this is last request and they only gave them 15 days) They Submitted docs on Jan 24th, PPR on Feb 21st.
So if everything else is done in your case, you may get DM soon after submitting these additional docs.