Any Expo-Gl Tutorials?

Are there any tutorials for using expo-gl? I was trying to use this tutorial, but it seems expo uses a different format, and that format isn’t really mentioned in the GLView docs

expo-gl is implemtning WebGl or WebGl2 (depending if device support it), Our implementation is not 100% complaiant with a specs, but it mostly relates to error handling (sometimes it throws exceptions instead of using gl.getError). Main difference is how you are accessing gl object instead of calling canvas.getContext("webgl2"); you need to pass onContextCreate prop to GLView.

You can find few examples here https://github.com/expo/expo/tree/master/apps/native-component-list/src/screens/GL