Please provide S secure app in s20feI don't want to use 3rd party app for privacy concern

One idea for samsung from my sideS Secure app for s20fe coz I'm using 3rd party app for lock my apps and I can't trust any apps I paid good amount of money for samsung s20fe 5g coz it comes with Knox securityS secure app is needed anyhow

I don't want to install 3rd party apps for this anyone help me to get s secure