How long will it take to receive a face-to-face notice after the US immigration is approved?

As you asked, since all the visas have been issued, how can I sign them back? If you mean that the documents have been submitted to the visa center after the approval of the Immigration Bureau, the visa center will review them for about one or two months, and then transfer them to overseas consulates for an interview. The rotation process takes about 4-6 months. According to the consulate, it is normal to wait for six months. If submitted electronically, the time will be greatly shortened.

A few months ago, the schedule of class F2A went backwards. Even if you hand in everything before the deadline, you can't arrange an interview. So it depends on whether your priority date and schedule have arrived. Whether it is arranged by the consulate or you register for an interview on the visa website, you will receive an email notice from the consulate.