You won't find an Uninstall Button, but you may find a "Remove ____" application icon for some programs. If there is one, it's best to run it. Second best is the "jack-of-all-trades" uninstallers like AppZapper, but they are not perfect. (so says MacWorld, not just me) But, as noted above, in many cases just dragging the icon to the Trash is all that's required. How to know? Use the Help file for the app and search for "uninstall" or "remove".