Does korea even have a serious drug problem? Alcohol yes but drug? No... one of the lowest prevalence rates in the world. I’m sure it will still be good but the subject matter feels out of place for korea... would fit better in the USA (which this type have show has been done many times in the USA).
It is fairly obvious that Netflix is the one that have the final say, because all the actors and director want…
"“Borderland” has been viewed by 18 million member households and has already been renewed for a second season. Meanwhile, in its first four weeks on Netflix, 22 million have watched “Sweet Home” on the platform."
https://variety.com/2021/streaming/asia/asian-series-global-audiences-netflix-1234887766/
If AIB got a season 2 with less viewers than idk why SH wouldn't, but yes maybe the budget will be smaller which would be unfortunate.