You will not ‘see’ any buttons on that screen, and the UI you’re referring to is from Classic - this DTH hasn’t been updated for New - so you won’t see the ‘configure’ icon. That also means this device is using the old style of presenting its button devices so you’ll have to use a smartapp such as SmartLighting or Advanced Button controller to map the buttons.
I use the Advanced Button Controller SmartApp: [BETA] Advanced Button Controller (ABC) - SmartApps & Automations / Community Created SmartApps - SmartThings Community