Gyro lowpass filter

Dear community
There are 2 parameters that define gyro cutoff frequency: MPU_GYRO_LPF_ENM and IMU_GYRO_CUTOFF.
I use Pixhawk 2 Cube black which primary IMU 9250, so seems that the first wan is more relevant, however it does not appear in parameters list (in QGC), the second one does, so I use it.
I’d be happy to get an explanation
Thanks!