For the BMI160, both the accelerometer and the gyroscope are in suspend mode after a power-on reset. The power current consumption is approximately 3 uA. No settings are required.
You can refer to the BMI160 Datasheet. In the datasheet, there is a reference design that instructs you how to connect the BMI160 to the system.
I suggest you check Registers 0x02 and 0x03 for the sensor status.
Also, could you please provide more details about your test conditions and upload some pictures? It will help us better analyze the problem.