Instantiating a UI element Screen.height and Screen.width way off

I am trying to instantiate a UI element that represents a player and their score.
When I use Screen.height even when I scaled it based on the parent canvas with Vector2 panelBounds = (new Vector2(Screen.width, Screen.height) * mainCanvas.scaleFactor);
This is my main block that instantiates the UI element based on the bounds of the screen

 public void AddPlayer()
     {
         Vector2 targetPos;
         //Defining the screen bounds and accounting for the canvas scaleFactor
         Vector2 panelBounds = (new Vector2(Screen.width, Screen.height) * mainCanvas.scaleFactor);

         //Instantiating the UI element as a NameTag component
         NameTag localTag = Instantiate(nameTag, new Vector3(0.0f, -panelBounds.y, 0.0f), transform.rotation).GetComponent<NameTag>();
 
         localTag.transform.SetParent(container.transform, false);

         //Sets the name and teh score as placeholders
         localTag.Initalize(name, Random.Range(0, 100));

         //Gets the size of the UI element that was instantiated
         RectTransform tagRect = localTag.GetRectTransform();
         Vector2 tagSize = tagRect.sizeDelta * mainCanvas.scaleFactor;

         //Sets the target position to the top of the screen
         targetPos = new Vector2(0.0f, panelBounds.y + tagSize.y / 2);
 
         localTag.MoveToPos(targetPos);
   }

  

   public void MoveToPos(Vector2 target)
     {
         this.target = target;
 
         StartCoroutine(Move(timeToArrive));
     }
 
     private IEnumerator Move(float time)
     {
         var elapsedTime = 0.0f;
         var startingPos = transform.localPosition;
 
         while (elapsedTime < time)
         {
             transform.localPosition = Vector2.Lerp(startingPos, target, (elapsedTime / time));
             elapsedTime += Time.deltaTime;
             yield return null;
         }
 
         transform.localPosition = target;
     }

This is what happens when the resolution is anything but 1334x750

This is close to what I want but it is not exact and I feel like it should be
Is there a scaling thing I am not accounting for? Thanks in advance