The recent update to Android 12 for Samsung S20 FE is indeed superb!Unfortunately, the more stylish feature for Lockscreen Notification when on Android 11 which included colour light lining around the screen in Lock Mode is absent in the Android 12 U...
SAMSUNG S Secure is not compatible with S20 FE. As S20 FE is a high-end phone, Samsung should provide or integrate an App Lock facility in the phone rather than leaving the customer to install 3rd party or Non-Samsung approved