US Immigration from Vietnam

So is this really required? Never before have I ever had to send my original birth certificate in the mail, particularly overseas! Honestly it seems ludicrous but there it is in the instructions on the HCMC consulate website. I note the instructions also mention exceptions for this may be made on a case by case basis. Anyone have any experience with this, let alone have any idea why they would need this?

If it weren't for the pandemic situation I would have happily brought the original with me, but obviously that's not possible now. So I guess I will write my State for a certified copy... just seems ridiculous. Any other gotchas I should know of? I've seen mention of family trees....?

Can anyone recommend a lawyer in HCM who is fluent in both English and Vietnamese and can aid with DS-260 + supporting documentation and interview preparation for my wife?

I have found this list on the VN consulate website, but if it would best to use a lawyer that comes recommended by someone who has used their service.

https://vn.usembassy.gov/u-s-citizen-services/attorneys/

This was an F2A application initially, but since I have become a US citizen, it is now proceeding as an IR1 (already been more than 2 years since marriage).