itzy is obviously 4th generation they opened the 4th generation along with txt but I understand why some might think they aren't since they debuted in 2019 and there are many girl groups debuting now
but when people include gidle and loona as part of 4th generation when they are clearly late 3rd generation I'm like
I still consider 4th gen started in 2019
But i can understand why some people consider it started in 2021 because it's since 2021 that 4th gen group really start to make wave
if 2019 is the start of 4th gen, bgs are doing even worst than before, only TXT and Enhypen are having success there