I included solo debuts but not sub-unit debuts (other than Exo-k because they debuted as two subunits). Also, I only included the original debut songs, so if members were added later, I didn't include their debut (sorry Yeri). Any pre-debut songs or mixtapes don't count either.
Also sorry if any of these songs are exactly their debut. I tried adding as many as possible and I might have rushed. Correct me in the comments!

Songs:
No More Dream - BTS
Adore U - Seventeen
Bon Bon Chocolat - Everglow
Bad Girl Good Girl - Miss A
Danger - Taemin
Elvis - AOA
District 9 - Stray Kids
Girls Girls Girls - GOT7
Fire - 2NE1
La Vie En Rose - IZ*ONE
Mama - EXO-K
Wonderland - Gugudan
Whoz That Girl - EXID
Q&A - Cherry Bullet
Replay - Shinee
Super Hero - Vixx
Push Push - Sistar
Into The New World - Girl's Generation
Breathe - Ab6ix
Insane - BTOB
To Heart - Fromis_9
Wee Woo - Pristin
Mr. Ambiguous - Mamamoo
LA chA TA - f(x)
Hola Hola - KARD
Crown - TXT
Boombayah - Blackpink
Chase Me - Dreamcatcher
Bad Girl - Beast
365 Fresh - Triple H
The 7th Sense - NCT U
Chewing Gum - NCT Dream
Firetruck - NCT 127
Treasure - Ateez
Pirate King - Ateez
Trespass - Monsta X
Pepe - CLC
Momomo - WJSN (Cosmic Girls)
Hocus Pocus - Bvndit
Glass Bead - GFriend
Dalla Dalla - Itzy
Birthday - Somi
Hide & Seek - Astro
Fanfare - SF9
Like Ooh Ahh - Twice
Vibe - 1Team
Solo - Jennie
Twins (Knock Out) - Super Junior
Latata - (G)I-dle
I Don't Know - APink
Happiness - Red Velvet
Gorilla - Pentagon
I Don't Like Your Girlfriend - Weki Meki
Hi High - Loona
Hot Issue - 4Minute
Boy - The Boyz

Carrd: momoxoxo.carrd.co
Instagram: @blingpeachy (finally made an ig for this wow)

Thanks for watching!