how to make 2d sprite flip vertically while looking at the mouse

I've got a 2d player sprite for a top-down shooter game that is supposed to flip vertically to face the mouse, and he is supposed to "hold" a gun sprite that is supposed to constantly point directly at the mouse. However, they both don't work properly at some angles and I can't figure out why. This is the code for the player:

void Start() { localScale = transform.localScale; }

 void Update()
 {
     pMovement.x = Input.GetAxisRaw("Horizontal");
     pMovement.y = Input.GetAxisRaw("Vertical");

     animator.SetFloat("Horizontal", pMovement.x);
     animator.SetFloat("Vertical", pMovement.y);
     animator.SetFloat("Speed", pMovement.sqrMagnitude);

     mousePos = cam.ScreenToWorldPoint(Input.mousePosition);

 }

 void FixedUpdate()
 {
     playerRB.MovePosition(playerRB.position + pMovement * moveSpeed * Time.fixedDeltaTime);

     Vector2 lookDir = mousePos - playerRB.position;
     float angle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg - 90f;
     

     if (angle > 0)
     {
         transform.localScale = new Vector3(localScale.x, localScale.y, localScale.z);
     }
     else if (angle < 0)
     {
         transform.localScale = new Vector3(-localScale.x, localScale.y, localScale.z);
     }
 }

and this is the code so far for the gun:

void FixedUpdate() { rb.MovePosition(rb.position + movement moveSpeed Time.fixedDeltaTime);

     Vector2 lookDir = mousePos - rb.position;
     float angle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg;
     if (transform.position.x <= 0)
     {
         rb.rotation = angle;
     }
     else if (transform.position.x > 0)
     {
         rb.rotation = angle;
     }
     
 }
 
 void Update()
 {
     movement.x = Input.GetAxisRaw("Horizontal");
     movement.y = Input.GetAxisRaw("Vertical");

     mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
 }

}

Any help would be greatly appreciated! I am kind of a noob and learned C# for this project, so it's still all very new to me. Thanks for any help!