Not able to find activities to launch from system apps

I was trying to make a widget which shows the current accent colors and neutral colors of the theme. Somehow I Created it also. I need to set the touch function to launch the Android easter egg app which has paint chips. I’m not able to find that app or activity. Are system apps hidden? Is there any trick to unhide system apps?

KWGT shows what it’s allowed to access. If it’s not listed then most likely there is some sort of permission restriction on that app which blocked the Kustom app’s access. This is not true for all system apps.