@lifegoeson123 Hey. My mom was in the same boat like your mom. Im also Vnmese as well if that help.
Applied in June 2022, got reentry permit in October 2023.
Safest route is for your mom return before July 2024 in case reentry permit get deny. If you return before one year, you are ok.
Thats what I did for my mom last year. Return to US before one year mark and go back to VN again. This is my mom 6th reentry permit, this time they only give her 1 year reentry permit. Which is sad compare to previous one which is 2 years.
Flying to LAX seems easier compare to IAD. One time, we flew to hawaii and the border patrol gave us a hard time even though my mom had reentry permit.
The border patrol cannot deny your mom entry. Only immigrant judge can. Unless she signed form I-407 to give up her green card at the airport.
There are some service for people staying outside of the US 5 or 6 years, then able to come back. But that is one shot only.
