How to make Oculus native UI in Unity3d?

I found in Horizon Workrooms it has UI elements that looks Oculus native which is pretty cool. However making UI in Unity3d requires customization to achieve this style. I believe Oculus provide some API or UI library so we can directly integrate these UI into our game projects, but I do not find any. Is there anyway to use some unity package or SDK to use Oculus native UI?