id say so
3rd gen started in 2012 and ended with 2018
4th gen started 2018 and now its 2023 so stating that 4th gen barely started is wrong when its been over 5 years now
usually what differentiates different gens from eachother is music style and overall popularity
for example bts, exo, got7 debuted with a similar vibe and were at the height of their activity at similar times (most content with the most amount of unique new viewers)
for 4th gen main groups include gidle, fromis, izone, itzy and you cant really compare them to new groups such as newjeans and fiftyfifty
same with stray kids and ateez compared to boynextdoor or the mnet group, theyre all really popular groups but you cant group them together anymore, the new gens style is very aimed at the general public compared to the previous ones