I'm using a NavigationSplitView on macOS which needs to show 2 or 3 columns depending on the selection of the sidebar. Column 1 has a list of main activities. Some of these just have some data to show and some have a sublist. Currently, when an item that has no sublist is selected, I set the 2nd column (content:) to: Spacer() .navigationSplitViewColumnWidth(0) This works, although it started hitting bugs requiring a workaround on macOS 26, which got me wondering, what is the correct approach here? NavigationSplitViewVisibility.doubleColumn is not the solution, as this hides column 1, not column 2.