From ACTIONS you can edit apps name or Delete an app.
Edit custom app's name.
App's name is shown on display only if show title layout is turned on.
Delete an app
Deleting an app will destroy its source remove it from flows and displays. This action cannot be undone.
CONFIGURATION is source dependendent. Please check source specific guides for configuration.
Use the app's source as your search word, e.g. Facebook, or Power BI.