Got my reply today β¦
To Whom it Concerns:
Thank you for your inquiry. The National Visa Center (NVC) has not yet received your petition from U.S. Citizenship and Immigration Services (USCIS).
Although the Form I-797 approval notice mentions a delay of up to 30 days for cases to be delivered to NVC from USCIS, current shipping times may be longer. If you have not received a communication from NVC about this case within 60 days from the I-797 approval notice, please contact us again.
Once NVC receives this petition from USCIS and enters it into our system, all case parties will receive a notice that they can begin processing if a visa number is immediately available.