How can I write my own script for Lens Studio? (Mirror and Hologram effect)

Options

I am developing mirror-like app on Unity. Users can feel they are looking at themselves. Users can still feel the mirror effect/hologram effect with one eye(right eye) closed.
Here is my work on ARCore.

https://play.google.com/store/apps/details?id=com.zenplus.ar.core.examples.java.augmentedfaces2

I am trying to copy-past my work on Unity ARfoundation to Lens Studio. I need to add my script something like Prefab for AR Face manager on AR foundation to Lens Studio. But I cannot find the similar procedures in Lens Studio.

Does anybody know how to do this ?
I am working with Mediatek's team to provide AR tools on the 3D display for game developers.