2nd gen aside . yes victoria from f(x) helped yes dara living in the philippines for some time helped
but in gen 3 the only time it fr worked was Lisa tbh and it’s mostly because there weren’t many SEA idols ( especially SEA female idols? i don’t even remember any besides her back in 2016?? )
twice : tzuyu was actually the most popular member for a very long time for her looks and it’s only recently that sana and momo became more popular
aespa : winter has been crazy popular in japan lately and many non kpop fans like her
izone : nako and hitomi weren’t even top 5 in japan , only sakura ( but to be fair she was an established celeb and even then, within the fandom minju had the same amount of fans as they always sold the SAME amount of plots and merch + chaewon merch sold the fastest )
kep1er the gp999 group : yaning was almost as popular as mashiro ( who was known among jp kpop fans already ) , on the top 50 of the most searched idols on yt japan only youngeun and yeseo appeared
i feel like it doesn’t actually matter like people from a country won’t bias the member from their country by default