How to do bullet spread in 2D?

I need help with bullet spread in a top down 2d game

My current code, located in a script that recieves an input from the player is:

 void Shoot()
 
 {
 
 Quaternion spread = firePoint.rotation * Quaternion.Euler(0,0, Random.Range(-100f, 101f)); GameObject bullet = Instantiate(bulletPrefab, firePoint.position, spread);
 
 Rigidbody2D rb = bullet.GetComponent<Rigidbody2D>();
 
 rb.AddForce(transform.up * bulletForce, ForceMode2D.Impulse);
 
 }

However, this does not seem to have any effect

Any idea why?