The similarities are:
1. The maknaes are the visual members of the group.
2. They get mistaken as the oldest member due to their mature appearance.
3. They all debuted at the age of 16 or 17.
4. They have the top physique in the group with tall height.
And below are the golden maknaes of JYP girl groups.
Wonder Girls Sohee - debut age 16
miss A Suzy - debut age 17
TWICE Tzuyu - debut age 17
ITZY Yuna - debut age 17
Did you notice any other similarities among JYP girl group maknaes?