Cannot view code files for Editor Standalone Window and Editor Toolbar Button

Hello, I’m using UE 5.5.1. I’ve created one of each plugin (Edit → Plugins → Add) and built successfully. These two plugin types (Editor Standalone Window and Editor Toolbar Button) do not show up in the content browser. Am I looking at the wrong place or is this a bug?

The functionalities work but to open up the code files, I need to directly open them in VS, their folders aren’t found here: