Stylized passthrough: How can i retexture walls?

Meta Horizons documentation on Scenes gives this image as an example of a Basic stylized passthrough.

This looks to me like a screenshot of a stylized hall way.

How can such an effect be accomplished in Kotlin without using Unity or Unreal?

Can this effect also be achieved on Quest 2 or only on Quest 3(s)?
The article mentions that Assisted scene capture (available on Quest 3(s) only) shouldn't be used to create such an effect.