For that to work you need device types that Athom has built functionality for, at least in Homeys own apps. A thermostat does that, so for temperatures [App] Virtual Devices can create a virtual thermostat for you to show the value on, but the range is limited. You could also use a virtual alarm to show boolean values.
Most people revert to outside dashboards such as Homeydash.com, a Homey dashboard, or Node Red: A widget based dashboard working with Homey trough MQTT or one of many others.
Did you know the Homey web app (beta) can show way more values for each device though?
