How to implement functions similar to geometry shaders with Babylonjs?

Questions
#1

For example, you already know the coordinates of a point. On the basis of this point, you can use the shader to process a sphere around it and render it. OpenGL can be realized with geometric shaders. How can Babylon be realized?

#2

You can not or only on CPU. This is not available to either WebGL or WebGPU

#3

Hey there just checking in, was your question answered? @yuemiao