Change starting position of Instantiate object

Hello,

I am new to unity, so there might be some mistakes in my logic but all ideas are welcome.

I am developing a 2D game multiplayer game.

I have to say that the screen is scrollable and only a part of the scene is visible on the camera every time. In every game for the first player I want the sprites to move from left to right, and for the second from right to left. So I use this code to flip the whole world

  void Flip()
     {
         //Get the current state of world to a temp variable
         Vector3 theScale = transform.localScale;
         //Reverse the vector
         theScale.x *= -1;
         //Set the vector as the new state of world
         transform.localScale = theScale;
 
         //Basically reverse the whole world including the sprite
     }

I have the original sprite created and it starts and moves normally from left to right or from right to left according to the player's turn using this code

  startingCollider = redStartingCollider;   // collider on left side of screen, same for player 1 and 2 because of world fliping
 
 //To set a default position
  Vector3 pos = transform.position;
 pos.x = startingCollider.transform.position.x;
 transform.position = pos;
 
  if (PlayerScript.playerTurn == 2)
         {
             speed *= -1;
         }

Now I want the user to create new sprites when clicking on a button and I want sprites to begin from the same position every time. So I use this code when the button is pressed

   GameObject ob=Instantiate(unit);
   ob.transform.parent = parentObject.transform;
 
 // To set default position not a relative to an object
  Vector3 pos3 = ob.transform.position;
 
 if (PlayerScript.playerTurn == 1)
  {
        pos3.x = redStartingCollider.transform.position.x; //collider on left side of screen
 }
 else
  {
        pos3.x = blueStartingCollider.transform.position.x; //collider on right side of screen
 }
 pos3.y = 13;
  ob.transform.position = pos3;

If the player's turn is 1 and there is no flip in the world the orignal sprite and it's children begin to move correctly from left to right.

The problem is when player's turn is 2 and the world flips. The original sprite begins from right and moves to left but it's children continues to begin from left.

What am I doing wrong? Any suggestions? Thanks in advance and sorry for the long post!

PS. Colliders that are used as starting points are not necessarily visible on the screen every time. I just want sprites to start from this specific point every time one is created.