US Immigration from Senegal

Does anyone know how the processing service center is assigned for an I-129F?

Does anyone know approximately how long it takes to have your documents returned after the embassy takes your passport and documents? In Dakar are you returning to the embassy to collect the documents and passport or is there another location?

I have so much enlightenment because I am really afraid.
Here is my situation:
My father is an American citizen.
I am 23 years old.
The category of my visa is IR2.
My priority date is April 27, 2021, I was not 21, I was 20 years old.
My DQ is December 12, 2022
Now I have had my interview which will take place in September 2023
I would like to know can the consular officer refuse me the visa because of my age? Which is currently 23 years old.
Please help me, I'm really scared

I'm curious if anyone has any experience or knowledge about document requirements. My beneficiaries attended their visa interview, IR-2 category, and were given a deficiency checklist for an original marriage license and original divorce decree. We provided both documents but they are now being told the divorce decree must come from a "tribunal court" (Senegalese equivalent their highest court) and not the local City Hall. This information is not written on a checklist they agent at the document window will only give this information verbally to the beneficiaries when they present the documents at the embassy.

I've reached out to the Congressional Liaison and they were given the same information that is on the checklist and are being told the divorce decree only needs to be an original.

Has anyone else experienced the embassy not accepting the documents? We have tried to have a divorce decree issued through a "Tribunal court" and we have lost $5k paying lawyers and never getting anything or on a court schedule. If anyone has any experience in this area that would be helpful.