Xiaomi Security
com.miui.securitycenter
Removing the app may cause bootloops. It does not cause bootloops in Redmi Pad or MIUI 13 onwards, but you will lose some functionality like the battery status/usage page, as well as the app usage/removal page.
Provides “protection and optimization tools”: App lock, Data usage, Security scan, Cleaner, Battery saver, Blocklist and other features. It is mostly a front-end (UI).