UI Button on Viewport

Hello. I am trying to create a UI Button on Viewport using Python script.
Does anyone how to access the Viewport and create a Button on it?

@AbhishekNajan i could be wrong, but i think what you are looking for might be build_viewport_overlay()

https://docs.omniverse.nvidia.com/workflows/latest/extensions/viewport_reticle.html#step-1-3-familiarize-yourself-with-build-viewport-overlay