I'm having some trouble figuring out how to display my XBox controller with OBS

I looked at some speedrunners recent runs for Pokemon Red and Yellow and noticed something like this picture below

Is there a GitHub repository for the XBox controller input display?

People on controller use https://gamepadviewer.com/ and add it as a browser source in OBS after doing custom mapping if needed. Getting A and B swapped and having extra A and B buttons showing is done by just adding more browser sources from gamepadviewer and moving/cropping them together to sort of make it look like it's just one capture.