Here is the ranking of the 4th gen girl group members with the most composing credits.
We are talking about composing credits (which mean creating the melody of the song), not lyrics credits
1. (G)I-dle - Soyeon : 37 songs
2. (G)I-dle - Minnie : 10 songs
They are all bsides for (g)I-dle
3. Purple Kiss - Chaein : 9 songs
They are all Purple Kiss bsides
4. (G)I-dle - Yuqi : 8 songs
6 are (g)i-dle bsides
1 is the title track of her solo debut
1 is a bside for another artist (Miyeon)
4. Kwon Eunbi (soloist and ex-Izone) : 8 songs
6. Purple Kiss - Na Goeun : 5 songs
purple kiss title tracks : 1
purple kiss bsides : 4
6. Choi Yena (soloist and ex-Izone) : 5 songs
8. ex-Weeekly - Jiyoon : 4 songs
weeekly bsides : 4
9. Lesserafim - Yunjin : 3 songs
solo songs : 3
9. Secret Number - Minji : 3 songs
secret number bsides : 1
other artists title tracks : 2
11. Purple Kiss - Swan : 2 songs
purple kiss title tracks : 1
purple kiss bsides : 1
11. Purple Kiss - Dosie : 2 songs
purple kiss bsides : 2
11. Purple Kiss - Ireh : 2 songs
purple kiss bsides : 2
11. Jo Yuri (soloist and ex-Izone) : 2 songs
izone bsides : 1
yuri bsides : 1
11. fromis9 - Seoyeon : 2 songs
fromis9 bsides : 2
11. fromis9 - Jiwon : 2 songs
fromis9 bsides : 2
17. All the following names have composed one bside for their respective groups : Yuki (Purple Kiss), Park Jieun (ex-Purple Kiss), Hayoung (fromis9), Chaewon (Izone), Sakura (Izone), Songsun (Tri.be), Bora (Cherry Bullet)
Congrats to everyone on the list, creating a song is not easy.
Tell me if I missed anyone