I have Use keyboard navigation to move focus between controls selected in System Preferences, so but the tab key isn't working to select different controls (such as drop-down menus and checkboxes) in application dialog boxes. For example, I tried the Preview Preferences dialog box.
I have tried multiple different applications, and I do not to my knowledge have any additional software running that would be intercepting the tab key press.
Is this a problem that is local to my computer, or am I missing something important?
MacBook Pro running macOS Catalina 10.15.2