When I use InDesign some times the Screen Mode selector is missing from the left Toolbar. The only fix is to change the Workspace to another and then back to the original workspace. The first image is the missing Screen Mode selector and the second image is how it should look. This happens on macOS Monterey (12) and macOS Ventura (13) and in both InDesign 19.0 and the previous InDesign 18.5.