While those at Sr nationals may not fit the mold for a pairs skater, there are likely skaters not making it to Sr due to lack of 3A and quads, but that’s not required for pairs.They have tons of female skaters but not male ones. Of the male skaters, most are still pretty young and on the shorter, scrawnier side.
Of the ten male skaters at Sr Nationals last season, 3 are not Sr-eligible, two are below 170 (which makes it much harder to find a suitable partner) and the rest are 172 cm or 173 cm tall, with the exception of Yunhwan (duh) and Sihyeong. Sihyeong might be the most suitable for pairs from a physical standpoint, but not with his shoulder injury and not with him still being competitive in singles in Korea.
Any pair with a foreign partner would probably have to be successful first (like Lim/Quan) to even have a chance of getting Korean citizenship (and a lot of men probably don't want to do military service for obvious reasons).
A solid 2A and one triple is enough to get minimums.