Use APKPure App
Get Screen Off Pro - Lock Screen old version APK for Android
'Screen off' help you turn off screen and lock device without power button.
Lock your device with just one click!
'Lock Screen ' is a tiny app that can help you lock easily (without power button).
Screen Off Pro.
How to unInstall:
Before uninstalling the 'Screen Off Pro', disable admin permissions in Location & security > Select device admin > "Screen Off Pro"