In iOS, the Control Center can be used to quickly take a picture, jot down a note, turn on the lights, control your Apple TV, and much more.
There's an option in iOS that enables you to disable access to the Control Center from the Lock screen.
To disable Control Center on the Lock screen, go to Settings, tap Face ID (or Touch ID) and Passcode, enter your passcode, and turn off the switch next to Control Center.
With Face ID, unlocking your device is as easy as picking it up, making the disabling of Control Center on the Lock screen less of an issue.