I did reach out the embassy at the end of June. They said there is no immigrant visa backlog, but they haven't received the case from NVC yet. Plus, the NVC case timeline site shows that the case is still at NVC. Per your note, it"s true that they have a non immigrant visa backlog. However, per my email exchange with the embassy, they specifically mentioned that there is no backlog for U.S. spouse cases. I will reach out the embassy again today. Thanks.