Do agencies publish Korean age?

Profiles usually list birth date; the “age” number depends on the writer’s counting system.

Should I convert comments automatically?

Only when you know which system the speaker used.

Ages · 세는나이 vs 만 나이 — 케이팝 팬이 말하는 차이

Âge coréen vs international

International age: 0 at birth; increases on each birthday.
Traditional Korean counting: often 1 at birth; many people historically added a year on lunar/solar New Year rather than on the birthday.
Civil shift: from June 2023, South Korea aligned many official age references to international age. Everyday speech and older articles may still use the older habit.
Practical tip: if a source says only “born in 2002,” ask for month/day before asserting an exact age on a specific date.