I don't know if I have to say that but I hope more investigation from experts!
Lenovo or Mk spying on users on this device!
I tracked some recovery logs and hidden apps there's shell app and many other apps unknown!
Lenovo support team still avoid and ignore bootloader unlock requests!!!
I tried all steps from online to rot device, didn't work!
because volume-up not working in fastboot mode.
my advise don't waste your time to root it and buy another device can be rooted.