i have a similar issue here with the 'turnoff blocking'.
I can activate the 'block the off button' feature in the settings menu, but i'm still able to turn off the phone easily - it doesn't ask for the PIN i choosed, not even after marked the phone as missing on my other device. (However, i assume the blocking fuction should work before marking a stolen phone 'missing' anyway.)
I can switch off the phone from the lock screen or having the power button pressed down for a few sec either. I tried the function using a 'pair of phones', such as a Honor10 and an Iphone5s.
(Sound alert / message functions worked well.)
Could somebody tell me what should i do differently?
Thanks in advance.