US Immigration from Ukraine

My wife (K-1) has her interview scheduled for Nov. 30. Her daughter (K-2, 5yo) does not yet have her interview scheduled, but it would be at the same FO. Her application is about 2 weeks behind her mother's due to it getting separated at the Lockbox.

Can her daughter come to the interview with us? The instructions clearly say that she cannot (since my wife's application is marriage based, I can and must come as well; nothing else in the list specifies that her daughter can since this isn't the daughter's interview).

I ask this question partially because of babysitting. But also because I'm wondering if the interview works similar to how the biometrics work, in that you can do both interviews on the same day. If, for instance, her daughter also gets her interview scheduled for a different day, can she comes with us on Nov 30 and we do both on the same day?

I'll be in Ukraine for a couple of weeks around the New Year. We can rent an apartment together.

Alternatively, Jenya can potentially get a job in Western Europe (where I would visit her).

Are there any thoughts which would stronger evidence to the embassy?

I'm ambivalent. The apartment together is easy and comfortable.

I think working in Western Europe can be a good life experience.

We will also get her ITIN and file a joint tax return.

I'll do the standard estate planning stuff to include her.

I went online to the USCIS site and changed my address while an RFE was pending. My mail forwarding wasn't working at that point because of the issues with the PO. Anyway, all that was sorted out with the RFE and I was approved. They also said in one of the calls that my address was updated. Almost 2 weeks after my approval, I was sent an AR-11 because the letter included said "Cali service center received the change of address request for your WAC # XYZ. Please note the request for the new address change has been updated for the WAC #. In order to complete processing of this address change within USCIS, DHS; you must also complete an AR-11 form and mail to the address below:
(It lists the DHS address in Virginia)

Then it goes to talk about all non citizens over the age of 14 must complete this within 10 days of the address change.

My question is, if I, the USC, put in the address change for me and it shows on my paperwork now, do I fill out the AR-11 with my information and the address or her information and the address? I assume mine but I would have to check some boxes in a strange way because this is tailored for a non citizen. I am probably going to try to call USCIS just to see but I was confused yesterday and could not figure out how I should fill this out. I assumed the online form was enough, but again, I am wondering if this is for her side for when she arrives as stated in the I-129F at the beginning. I do think I probably should not have performed this and just waited and trusted the forwarding, but I try to do things correctly haha.

If anyone can shed light on how I should approach this AR-11, I would greatly appreciate it. Most of the posts I found were centered around AOS and I am not quite there yet.

Hello,

I had my interview on October 19ht. Next day, I saw my case status updated as Oat ceremony is scheduled.

I can review letter on the portal. The ceremony is scheduled on November 3rd.

This Monday the official letter/invite should have came by mail but it did not arrive. It could be lost in mail or something. Even it was in my preview email form USPS.

So what should I do now? Should I just print a letter from portal and go to ceremony next week?

I have tried to file missing notice request on USCIS website, but they will not get back to me till Nov 18, which is way pass my ceremony day.

For me, the estimate a few weeks ago was April. Then it was May. Now it is July. My application shows at Nebraska with no action yet.

Is this stretching out a common experience now?