Why does my android pedometer not change textview value?

Question

I am currently developing an physical activity tracking app for my university projectand i'm starting by creating a pedometer but it doesn't work.

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.WindowManager;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements SensorEventListener{
    private TextView textViewStepCounter;
    private SensorManager sensorManager;
    private Sensor nStepCounter;
    private boolean isCounterSensorPresent;
    int stepcount=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        textViewStepCounter = findViewById(R.id.steps);

        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

        if(sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)!=null){
            nStepCounter=sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
            isCounterSensorPresent=true;
        }else{
            textViewStepCounter.setText("Counter sensor is not present.");
            isCounterSensorPresent=false;
        }
    }

    @Override
    public void onSensorChanged(SensorEvent sensorEvent) {
        if(sensorEvent.sensor == nStepCounter){
            stepcount=(int) sensorEvent.values[0];
            textViewStepCounter.setText(String.valueOf(stepcount));
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int i) {

    }

    @Override
    protected void onResume() {
        super.onResume();
        if(sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)!=null){
            sensorManager.registerListener(this,nStepCounter,SensorManager.SENSOR_DELAY_NORMAL);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if(sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)!=null){
            sensorManager.unregisterListener(this,nStepCounter);
        }
    }
}

After trying it on my phone (Huawei Mate20 Lite) it doesn't change the TextView value, is there something wrong with the code ? Or maybe I don't have the sensor?

Other pedometer apps work just fine.