How long does it take after USCIS approval to NVC case creation?

It seems to vary but expect a few months at least.

Sometimes a couple of weeks and sometimes three months.

The USCIS response to this question has been 60+ days.

Once immigration approves the I-526 it usually takes about 30 to 60 days for the paperwork to arrive at NVC. Once at the NVC, paperwork is generated, including fee bills to complete all paperwork as to the individuals who will be immigrating. The normal processing time for NVC paperwork completion depends on how quickly the individual completes the documentation requirements. On average about 90 to 120 days. Once completed, an interview will be scheduled at the embassy/consulate in the individual''s home country. However, due to COVID19 the consulates are not processing interviews.

We have a case that was approved for EB-5 in mid-February and, as of mid-November, it was still not given to the NVC. An inquiry from a U.S. senator got it back on track in three days.

It should normally take 60 days, but due to the pandemic, we are seeing delays in the USCIS sending files to the NVC. You can try emailing both, the IPO and the NVC, to determine where the file is and try to shorten any delays in the NVC file creation/processing.