US Immigration from Argentina

I m trying to verify my husband s identity through the USCIS tool so we can do a myeverify.

However this requires a DOS number, which is not easy to find for people who entered the US on a K-1 visa.

I THINK I finally found it on the print out for his interview back in Argentina. However, when I use it in conjunction with his A number (applicant number) it says it s not correct, even after making sure I m using the correct number of digits for the DOS number.

Can anyone shed light on this? Am I using the wrong number for DOS? I ve checked his visa, all his paperwork that s been sent and I cannot find this if that isn t the number.

We sent the I-130 form 2 weeks ago but My "My Progress" tab is not showing any estimated time till decision, it only shows: "Reciept has been sent." Please help. I notice that everyone can see their progress, I know it means nothing but we find it rare that we can't see it

I m a US citizen and my spouse (beneficiary) is from Argentina but is eligible for an Italian passport, which in theory would allow her to visit the US with only an ESTA (VWP country). My question is, would this present issues with the processing of the application? Would she need to prove intent to return to her country beyond having a return ticket even though it s not a travel visa?

The other concern is that she d be traveling with our newborn baby who has my last name (different from hers), so she ll need a letter of consent to travel with the baby which would presumably indicate that she s traveling to the US to visit her US citizen spouse. The last thing we want is for them to be turned away at the airport in the US.

Me and my partner are looking on what we can do to be together, and a K1 visa looked like the best way to proceed. English isnt my first language, so please be undestanding of any typo.
We have been dating for two and a half years, recently had our first in person meeting and have talked about our intent to marry.
Thing is, i've been reading this site for the last few days and all I have read has really discouraged me. Despite being together for weeks, we focused more on having a good time together rather than taking pictures so we don't have as many distinct pictures as other applicants I have read from this sites. Our conversations and video/voice chats are mostly contained on a single app, and I dont know. Dont wanna give away tons of info to internet strangers but I don't think our relationship looks anything like the approved ones from 5+ years old threads about argentinian applicants.
I have read here that since I am from a poor country, a lot more will be asked of us during the interview and stuff. Having had a tourist visa declined (with which I planned to visit her) has left a bad taste in my mouth and leads me to believe that.
Would you say pursuing a K1 visa is a possibility for us, would we have any chance of approval? Should we wait? and if not, what do you recommend?

Does the embassy in Argentina allow co/joint sponsors for k1 visa? Thanks so much!