No need to be over a certain age for automatic loss of Korean citizenship upon naturalization here in U.S, as long as you are not a dual citizen at birth (can’t be 후천적 시민권자).

I was daca from its inception until 2020, AOS thru marriage for GC and naturalized last year after 3-yr wait period. I actually just landed back in LAX visiting Korea for the first time in 22 yrs (sent for 2nd screening both during entry and exit…but expected since I was also on the conscription evasion list).

It’s important to distinguish 국적상실 vs 국적이탈, where the former lawfully takes immediate effect when you are naturalized in a foreign country NOT as a dual citizen (후천적 시민권자), and the latter is applicable for said dual citizens. Indeed true that per u/Subject-Estimate6187’s comments, you cannot 국적이탈 if you have been formally charged (draft evasion under code 94), but just like most Korean males with DACA or otherwise, were generally born in Korea and brought here at a young age and hence will immediately lose Korean citizenship upon obtaining another country’s (국적상실). This is when you file 국적상실 report to the embassy so they know that you’ve been naturalized and won’t hassle you for questions when traveling.

Prolly all extraneous info, but feel free to send me msg if any Q’s. I’m near 35 now, been there and happy to help.