Yes, I will ask that you just wait for 3 weeks after your approval and then contact USCIS Through Emma chat. If you wait for three weeks, they will send you the receipt number and then you will enter the receipt number in the USCIS status check platform and see when they have sent you the final approval.
Alternatively, you can got through USCIS Emma chat( https://www.uscis.gov/). When you scroll down the page, a tiny tab will appear on the upper right side of the platform which says " Need Help? Ask Emma. Click on it and type "Chat with a live agent" Then, choose "no receipt. They can be slow while responding because each live agents attends to 3 -4 people at the same time. They will ask for a lot of details ( name, address, phone, alien number etc.) so just keep those handy. When they ask for the issue you are contacting them for, type exactly this:
"US Department of State electronically forwarded a Form I-612 to USCIS around Sept 1. Can you please help me find the receipt number for it?"
But the best trick is just to wait for about 3 weeks and they will mail you the receipt. With that receipt number, you can then go into USCIS status check platform. This is because the people who manage the Emma chat do not always have full access to the USCIS backend documents. In my case, I kept asking Emma chat staff to help find my receipt, and they told me 3 time that it was not yet in the system. I later found out that USCIS has mailed the receipt to me 2 days earlier. The Emma live agents did not even know that Uscis had already prepared and mailed the receipt out to me. But if after a month you do not get the receipt number, tell Emma agents to raise a service request for you and they will do so.
It is a lot of info here, but let me know if it is clear to you.
Luck
