Below is the screenshot of my top row (I don't know the correct term). Since it is long, I wrapped it in multiple rows, but they are actually one row.
There are I do not need, at least so far, like the "Scene", "View Layer", or the Blender icon button. And there is an empty area. But it is missing some button I would like to have. For example, I would like to have a button to "Toggle Window Fullscreen", or a button to minimise the window (when Blender is in Fullscreen, that button will be useful).
Can I add/remove things to/from the top row?