Kamas:
I can only speak to the A&P, but if by "convertible" you mean to present your ICAO license to the FAA and they "convert" it to an FAA certificate, then the answer is no.
And that is the same for any other type of license. There is no direct conversion to a FAA A&P.
Anyone wishing to obtain an FAA A&P must have the same experience requirements and pass the same tests. There is a slight difference in the process for foreign nationals vs. US citizens or resident aliens.
I put several links below that give additional information. You might also contact the FAA International Field Office for Korea for input. I put a link to the Los Angles IFO also.
Good luck!
W1
FAA AC65-2D
https://www.faa.gov/regulations_poli...cumentID/22909
FAA Order 8900.1
05_005_003
FAA IFO
https://www.faa.gov/about/office_org...s/ifo/lax_ifo/