Kjun has confirmed they are aware of this and working on it, so it’s good news! See bellow:

[05.22.26] School Gameplay Pt.2 (Updated)

[05.08.26] Expanding on Foundations (Updated)

With this being said, there are a couple wishlist posts already discussing this, in case you want to check them / merge:

Zoi’s different sounds and walking styles.

Suggestions for InZoi CAS