In 8 gen 2 one plus 12r is supported ultra extreme option on settings..... But in iqoo 12 8 gen 3 only extreme+ option on BGMI 

Extreme+ is 90 fps - iqoo 12 8 gen 3

Ultra extreme is 120 fps - one plus 12r 8 gen 2

Almost 1 yr iqoo 12 still 120 fps ultra extreme option is not supported on BGMI 

Even a 8 gen 2 mobile supports 120 fps ultra extreme option on BGMI 

I share a screen recording of BGMI on iqoo 12 no ultra extreme option on settings 

Only extreme+ option 

Iqoo 12 not supporting ultra extreme option on BGMI only extreme+ support 

But 8 gen 2 one plus 12r support ultra extreme option on BGMI 120 fps