US Immigration from Nigeria

I'm making this thread on behalf of a friend. He's been having issues with NVC submission for over a year now. All the AOS and supporting documents for both Petitioner and Beneficiary has been accepted over a year ago, the issue seems to be with their joint sponsor. So, i will like your help with these questions.

1. What is the appropriate way to submit the joint sponsor's documents? Should both the sponsor's i864 and all other supporting documents like his transcript, w2 be in a single pdf or the i864 in a pdf and then other supporting documents in another single pdf?

Thanks

I'm a US Citizen born and raised here. I visited Nigeria in September 2021 when we were engaged. I filled out the I-129F petition for her in November 2021 and I received the receipt with Case Number right away. It was assigned to the California Service Center. I'm waiting for that approval so we can continue by submitting the DS-160 and she applies for the K-1 Visa. Since May 2022 the Case Processing Time was showing 13 months. I forgot when, but recently it started showing 14 months. As of beginning of November I believe it started showing 15 months, and now toward the end of last month the Case Processing Time even shows 15.5 months. It's been 1 year and almost crossing the 13 month mark now. Status still only shows "Case Was Received". I hoped she could get the Visa, come here and we get married by the end of this year, but now it seems impossible that will happen. I'm told there's nothing else I can do except wait.

According to their post at:

https://egov.uscis.gov/processing-times/reducing-processing-backlogs

times are supposed to improve, but they seem to be doing the opposite

Does anyone know which month (DQ) is receiving interview letter (IL) now at US Consulate in Lagos.

NVC accepted all my documents and then ask me to replace one clearer documents how is ut going to take for them to respond to this document? The last time uscis ask to replace a documents it tool only 3days so do any of you know how long would nvc take to respond

I am filing I-130 and I-485 concurrently. My wife is a US citizen. What other forms do I need to file in addition to the above please?