@s p It’s hard to guess what the RFEs could be, but birth certificates are a common RFE it seems. Even though you would have provided them when you filed your I-485 it is not uncommon for USCIS to request them again. Try not to worry, it shouldn’t be too long before you receive the letters in the mail which will detail what they are requiring. Good luck to you.

thank you for your reassuring words

Please let us know what's it for

my guess birth certificates

@Charlie SC finally got the letters by mail today, they want passport pictures, even though I submitted in Oct 2022 guess they need updated pictures.

@s p what do you mean by updated pictures?

the pics we submitted would be almost 2 yrs old so I assumed they want updated ones, either that or they lost my pictures.