Consular process for my wife Received case receipt on may 2019

Hello, I am a permanent resident and I am doing a consular processing for my wife who is back in NEPAL and I got my receipt paper on May 2019, haven’t heard anything yet since than and I just have a new born child from my wife in Nepal. What is the process to apply for my new born child ??? Also I have wrote a letter to the processing office about the update of my son 2 weeks before with all supporting documents but haven’t heard back Yet. Case is currently being processed at California Service Center. Thank you