Different models also come with the quick trigger for lockdown so don’t actually have to go into the menu and tap it. You just have to look in the settings under Security to find it, usually.
But realistically speaking, the simplest thing to do with Android is just turn it off. Hold the power button for a few seconds, it shuts down, and when they try to boot it back up it will demand a pin code first.
Different models also come with the quick trigger for lockdown so don’t actually have to go into the menu and tap it. You just have to look in the settings under Security to find it, usually.
But realistically speaking, the simplest thing to do with Android is just turn it off. Hold the power button for a few seconds, it shuts down, and when they try to boot it back up it will demand a pin code first.