LSM6DSO no data in FIFO

[XUEZHI]

FIFO_CTRL4 is 00A1 in hex , 10100001 in binary

FIFO_CTRL3 is 00AA in hex , 10101010 in binary

fifo_status1 is 00000000

fifo_status2 is 00100010

FIFO DATA OUT TAG IS 00100001

I have already set LSM6DSO like this but no data is inside the FIFO

Must I open and close embedded function?  I saw someone 's reply in the community 

riteRegister   ( LSM6DSOX_FUNC_CFG_ACCESS, 0x80 );            //Open Embedded Functions
    WriteRegisterBit( LSM6DSOX_EMB_FUNC_EN_A, 3, true );           //Enable Pedometer sensor in Adv Func
    WriteRegister   ( LSM6DSOX_EMB_FUNC_EN_B, 0x10);               //Enable false positive rejection
    WriteRegisterBit( LSM6DSOX_EMB_FUNC_FIFO_CFG, 6, true );       //Enable Step Counter Batching
    WriteRegister   ( LSM6DSOX_FUNC_CFG_ACCESS, 0x00);             //Close Embedded Functions

[XUEZHI]

FIFO_STATUS1 is 0000 in hex , 00000000 in binary

FIFO_STATUS2 is 00A2 in hex , 10100010 in binary

FIFO_DATA_OUT_TAG is 0021 in hex , 00100001 in binary

FIFO_DATA_OUT_TAG does not change