How to build Map app using 3D tiles

Hello, I am new to Cesium and heard about 3D tiles at an i/o event recently. I want to take benefit of 3d tiles capabilities and make a map of my surrounding to give a city tour:

I want to extend and build features like live tracking and giving directions to what and where to watch giving an immersive experience.
Can you answer some questions?
Will 3D tiles work in React Native?
How live tracking can be mapped with 3d tiles ?