Under App Settings, there is an item called Biometric Authentication. Here you can enable or disable Biometric access with Touch ID or Face ID. If you would like to require this authentication anytime you open the app, enable the toggle for your device. If it enabled, you can disable it by clicking the toggle. You can also look at other authorized devices and whether or not they have Biometrics enabled.
This feature is only available in the native app and is not accessible from the web version.
Note: to enable biometrics in the myRutgers app, you must have Touch ID and/or Face ID configured on your device.