Apps must be configured.
For this purpose, there must be a possibility to define the required values (with optional default values).
These values must be changeable in a separate screen.
I would not make the effort to make the settings screen for each app new, it should be something generic so that you always find your way around.
We would have to define a few components for the beginning, like Switches, Numberinput, Textinput, Dropdown etc.