US Immigration from Bangladesh

My DOB is 18th August 2001.

My Mother (LPR) applied for my I-130 December of 2016.

My I-130 got approved January 2022.

I was DQed May 2023 and have been waiting for an interview date since.

According to my CSPA age have I aged out? If I was to subtract the processing time of my i-130 by my current age then my CSPA age would be around 17? Unless there is something I'm missing.

I would like to include that during 2019 we were asked to provide a DNA test which we did and was accepted.

My question is, Do EB1 gets priority before Eb2 or Eb3 or they are all in the same queue?

My mother (LPR) lives with me in the US as a dependent. She applied for my 3 younger brothers who have their interviews in a few weeks. I am the financial sponsor for their visas. The list of interview documents they should bring with them includes proof of domicile for our mother. I am not sure what proof to submit because she does not have any of the documents listed on this page: https://travel.state.gov/content/travel/en/us-visas/immigrate/the-immigrant-visa-process/step-1-submit-a-petition/i-864-affidavit-faqs.html#aos18

She has a state ID, social security card, medical bills, and I have claimed her as a dependent on my tax returns for the past 5 years. Will these suffice as proof of domicile? I wrote a letter explaining she is fully dependent on me as part of the initial paperwork she submitted. Should I write another letter for my brothers to take to their interview?

We were asked by the NVC to add a new household member to our F4 case. Soon after, we received the DQ email. Should we still add the new member's documents or wait for the US Embassy interview schedule? Any advice would be appreciated!

my mom's name on her passport is AZ. K and on me and sibling's it is AJ. U (shortened for privacy concerns). first name is the same, just different spellings. U. is my dad's surname, which was added to me and my sibling's documents by teachers in our school, without any permission from our parents. and when we found out about it later, it couldn't be changed.

now, my sibiling who is a legal permanent resident in the united states wants to apply for a b2 tourist visa for my mom. and later a ir5 visa when she becomes a citizen.

what issues could she possibly have applying for these visas for my mom? we tried legally changing her name but there was nothing we could do. its not possible so far. will my mom have any serious issues with applying for and getting her tourist and parent visa approved?

should we opt for a one and the same affidavit? will the us embassy accept it if she clearly explains it to them?

PS: I'M FROM A SOUTH ASIAN COUNTRY.

literally any help would be appreciated, thank you in advance.