It’s not only 4th gen boygroups charting terrible digitally on korean charts but boygroups overall in fact. It’s quite unfortunate how 4th gen started in the exact moment boygroups digitals went downhill.
3rd gen ones with million times bigger fandoms are struggling to pull 200M digital points for a song nowadays. 4th gen boygroups are just unfortunate in that aspect but for physicals they started off when the physical market in kpop is in it’s peak so is not all loses.