How to use framebuffer fetch on Android?

I want to get the current scene depth and color in an opaque material on Android. I know we can use SceneColor and SceneDepth node if the material is translucent, but it only works on desktop. On Android, those nodes don’t work. So I want to use the EXT_shader_framebuffer_fetch extension(https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_shader_framebuffer_fetch.txt), but can’t find any helpful documents.