I don't stan most of these groups but I know them, so I'll just say my favorites or those I know the best I guess...
Stray kids- Felix/Hyunjin
Seventeen- Jeonghan/DK/S.Coups
Txt- Huening Kai/Soobin
Twice- Jihyo/Momo/Tzuyu
Itzy- Ryujin/Yeji
Nct- Haechan/Jisung/Jaehyun/Mark
Red velvet- Seulgi/Joy
Everglow- Aisha/E:U
X1-idk anyone
Gi-dle-Soyeon
Astro- Eunwoo
Lonna- Kim Lip/Jinsoul
Iz*one- idk anyone
Ateez- Hongjoong/San/Yeosang
Got7 - Mark/Jinyoung/Jackson
Stray kids- Felix/Hyunjin
Seventeen- Jeonghan/DK/S.Coups
Txt- Huening Kai/Soobin
Twice- Jihyo/Momo/Tzuyu
Itzy- Ryujin/Yeji
Nct- Haechan/Jisung/Jaehyun/Mark
Red velvet- Seulgi/Joy
Everglow- Aisha/E:U
X1-idk anyone
Gi-dle-Soyeon
Astro- Eunwoo
Lonna- Kim Lip/Jinsoul
Iz*one- idk anyone
Ateez- Hongjoong/San/Yeosang
Got7 - Mark/Jinyoung/Jackson