US Immigration from Hong Kong

Hi guys,

I came to the US on K1 visa a month ago but we haven't got married on the paper as I wanted to apply for SSN first.

It took me hours of waiting on the phone but I was able to schedule an appointment (Nov 5).

My question is - if the application was successful, can we get married the next day? or do we have to wait till i receive the physical ssn card?

Thanks so much for your help in advance !!

The interview is next week, and I'm curious, the appointment letter says if I'm here because of marriage, I need to bring my spouse's birth certificate? Is that necessary, or is a passport good?

Also, I watched many videos, and people brought tax return transcripts. However, the letter doesn't mention this. Do I need to bring that as well?

Finally, anything else I'm missing? So far I have:

Green card

Marriage Certificate

State Issued ID

Passport

Tax Returns Transcript (???)

Spouse Passport (or do I really need birth certificate??)

My fianc had an interview they told her she needed to update her D160 they did not give her any instruction on how to anyone experience this what do you do

As our NOA-2 gets closer, anxiety begins to set in as we question our process to make sure we've done everything correctly. Just looking for a bit of validation, as we're 95% sure we're fine.
My fianc e is a Chinese citizen, currently living and working in Hong Kong. She has a renewable work visa that allows employment and legal residency in HK. Based on this, we submitted Hong Kong as the desired embassy for her K1-Visa and interview process.

From my understanding, there shouldn't be any issues with this as long as we secure the police report from both Hong Kong and China, right?

So me (from Hong Kong, a permanent resident in usa) and my husband (us citizen) have a child (he s 29 months old now)

id like to ask obviously he is a USA citizen, but is he a Hong Kong citizen as well since I am a Hong Kong citizen? And if so, what I need to do or where I should contact to get a Hong Kong passport or ID for our son? Do we need to back to Hong Kong for this?