US Immigration from Egypt

After uploading all documents and payment of F3A fees on CEAC, we received Om April 2021 an email from NVC that all documents and fees are approved and that NVC will send to Cairo embasssy to schedule an interview

that was after the filing date

Now my questions:

1-what is meant by the Final action date?

2-What is the next step(s) that will happen ?

3- can we expect an interview before the final action date ? Or it should be after it

I'm confused about whether we are supposed to bring financial evidence and the affidavit of support to the visa interview as I'm seeing conflicting information.

On the interview preparation page, as picture below, it says it is not necessary to bring the Affidavit of Support or financial evidence submitted to NVC.

However, this appointment letter checklist (for example) states the Affidavit of Support and recent tax returns are required?
https://travel.state.gov/content/dam/visas/Supplemental/appt letter_checklist for interview.pdf

So, I'm confused. I guess we should just bring them anyway to be on the safe side?

On that same note, we do need to bring the most recent tax information right? I, the petitioner and first sponsor, have not filed taxes as I didn't have an income. So, do I need to create some word document stating that or can I just verbally tell them the reason why I didn't file? As for the joint sponsor, she filed her taxes already but had to pay in. She's already sent me her needed W2s but I think she doesn't have a tax return, is it sufficient enough to provide her W2s and Tax Receipt from where she paid? Please advise.

Is it okay to renew the passport which was uploaded to the NVC?

Can I renew the passport and bring the new one and old one to the visa interview or will the new updated passport cause a delay since it's different from what was uploaded to NVC?

Ever since my June appointment was cancelled in April they told me to keep checking the site for scheduling another appointment, for the first couple of days I was able to with no problem until I checked it about 3 times one day and started getting this error, now it would be fine if it reset the next day or even after a while but...

It's been over A MONTH AND A HALF and I still can't check for appointments, I sent them 5 emails and got 2 automated replies with no info on how to fix it, I even emailed the embassy and the immigrant section and got no reply.

I've been trying to get a hold of someone to help me on the phone and it either puts me on hold or says I'm not calling during working hours ( when I am ). Please help we've run out of things to do and we can't get passed this error I've gone over a week without checking and nothing changed.

Hello,

I'm very confused. My mom got an appointment for IR5 interview in Cairo-Egypt that was scheduled by NVC, can anyone help me to prepare the documents that she will need to bring with her in the interview.

Thanks,