If you are wondering when exactly did NewJeans debut and with what music, here is the full answer with the date and first song & MV.
Meet new K-pop girl band NewJeans: Minji was in a BTS' MV with Ed Sheeran, Haerin has been compared to Blackpink's Jennie, and Hyein loves Harry Potter … but what about Hanni
NewJeans Predebut Photos That Prove They Were Born To Be K-Pop Idols - Koreaboo
New Jeans (EP) - Wikipedia
Today's K-pop] New Jeans to debut on Japanese television
jasˢʰʰ on X: NewJeans will reportedly make their japanese debut in April. / X
NewJeans goes viral, challenges K-pop norms - Technique
NewJeans - Wikipedia
NewJeans Members Profile and Facts (Updated!) - Kpop Profiles
Intro to NewJeans Members: Meet the First Kpop Idol Group Ador (2023)
Hee-jin Min Producer NewJeans ETA MV Interview
NewJeans Becomes Fastest K-Pop Group In Billboard History To Debut 3 Songs On Hot 100
Rookie K-Pop Group NewJeans is Almost the Perfect Fit – The Hoya
New Jeans, NewJeans Wiki