What difference does that make?
Players have only recently gone from the KBO to MLB. You are very unlikely to be named HS Kim if you do not come from Korea.
The idea that multiple players from South Korea might be named Kim and have the same initials shouldn't be surprising.
Here is the list, not a huge amount of name variance, for instance, every name listed starts with a consonant, of which Hangul only has 14.
https://www.baseball-reference.com/bio/South-Korea_born.shtml
Multiple David Johnsons is more notable.