@banqath idk if this will help but I'll make it short XD
7 members ie Taeil, Taeyong, Yuta, Jaehyun, Winwin, Mark and Haechan debuted in 2016 with firetruck. They were followed by Johnny and Doyoung in 2017 with the track Limitless. In 2018 Jungwoo joined them with regular and during the Simon says era Winwin went on hiatus to prepare for the debut of NCT's Chinese unit WayV. Hope that helps. And don't mind me XD
I was just looking at your account and found this. And since no one replied I thought I will though I'm sure you know it by now XD