Use APKPure App
Get Screen Lock Widget old version APK for Android
No longer need to press power button, just touch the widget on home screen.
Lock your phone easily with only one touch. Lock your phone so the screen doesn't stay on, it will save the battery.
No longer need to press power button, just touch the widget on home screen.
Before uninstall you should disable admin permissions in
Settings > Location $ security > Select device administrators > Screen Lock Widget
In case of a problem just reboot your device then uninstall.