Using the grip gesture with Oculus touch controllers slowly would normally allow you to half close your hand and this also applies to any animation you have overriding it; currently, when you try this, your hand will close before the grip button is fully pressed in.

To repeat this, you'll need the Oculus touch and to slowly grip the grip button.

In the pictures, I'm pressing on the grip button as shown in the steam menu and it causes my fist to fully close in vrchat.