Do you think DJI Go app will plan to have a feature of enabling FPV for Virtual Goggles?   So far Litchi was able to do it (on android only) wherein if you move your head up and down it will represent the Gimbal Up/down of the camera and if you turn your head represents the yaw of the quadcopter.    My sole reason is I have shaky thumb control  and using an IOS .  

You are correct about the tilt,  however the yaw control only works on the Inspire.  P3 and P4 don't really have yaw, you turn the aircraft to yaw,  not just the camera gimbal.  That said,  I hope Dji gets on the bandwagon soon,  but the Litchi app Is pretty great.  You can do a lot more with the Litchi than with the Go app,  except certain calibrations,  like imu.

Would be great to have this feature in future!

I bought litchi for fpv but there is no fpv for ios yet