@Michaelsunzy - As mentioned above, often there is hidden NVRAM area that also needs these items changed, please dump vars as outlined above at post #4 and I will disable BIOS Lock and FPRR for you.
Then you will be able to FPT flash BIOS region, if you still get 167 after that, then that means flash programmer is required to flash in mod BIOS on this model. Sometiems that is only way, due to lock being inside a module not an actual setting you can change or that matters etc
Also, DO NOT change everything to USER or Super like you showed above, only change the exact items you need to change 