As it's been very long time and till now 120 fps is not yet unlocked in bgmi for iqoo neo 7 users 

With same processor infinix has already launched it since launched

I hope we get 120 fps in origin Os 6 for IQOO NEO 7 and Neo 7 pro 

Iqoo team please talk with bgmi team and from both side provide the 120 fps support