US Immigration from Egypt

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,

Greetings ,

I did submit the requested files on CEAC , Everything got approved and completed . However i was asked to replace 2 items out of 6 ( Birth certificate - Marriage Certificate )
I did replace them on march 2020 , and their status are submitted since then and never got changed .
Any Help regarding that please cause i have no clue what is going on there .

Public Charge Final Rule
I am applying for my parents, what is the Public Charge Final Rule?
Do I have to do anything about it?

I am submitting I485 for my parents. Do lockbox facility accept certified checks?

Do I need anymore documents for filling the I1-30 for a widow mother rather than my translated birth certificate, her translated birth certificate and her foreign passport?
Is there anything else

For the siblings, is the same my translated birth certificate, her translated birth certificate and her foreign passport?

Is that it?