Transform scale evenly from center to specific position

@TrueXRCo The following script takes two transforms as guides and changes the position, scale, and rotation according to these guides. I hope this is what you want. This will function after you start playing. You need to replace the Update function if you want it to work in the editor.

 using UnityEngine;
 
 [RequireComponent(typeof(Canvas))]
 public class CanvasEvenlyScale : MonoBehaviour
 {
 #pragma warning disable 0649
     [SerializeField] private Transform guideBottomLeft;
     [SerializeField] private Transform guideTopRight;
 #pragma warning restore 0649
     private Canvas _canvas;
     private RectTransform _rect;
 
     private void Start()
     {
         _canvas = GetComponent<Canvas>();
         _canvas.renderMode = RenderMode.WorldSpace;
         _canvas.worldCamera = Camera.main;
         _rect = GetComponent<RectTransform>();
         _rect.pivot = Vector2.zero;
     }
 
     private void Update()
     {
         _rect.position = guideBottomLeft.position;
         _rect.localScale = GetGuidedCanvasScale();
         _rect.rotation = Quaternion.Euler(new Vector3(0, GetGuidedRotation(), 0));
     }
 
     private Vector3 GetGuidedCanvasScale()
     {
         var guideBottomLeftPosition = guideBottomLeft.position;
         var guideTopRightPosition = guideTopRight.position;
         var height = guideTopRightPosition.y - guideBottomLeftPosition.y;
         var distanceX = guideTopRightPosition.x - guideBottomLeftPosition.x;
         var distanceZ = guideTopRightPosition.z - guideBottomLeftPosition.z;
         var width = HypotenuseLength(distanceX, distanceZ);
         var rect = _rect.rect;
         return new Vector3(width / rect.width, height / rect.height, 1);
     }
 
     private static float HypotenuseLength(float sideALength, float sideBLength)
     {
         return Mathf.Sqrt(sideALength * sideALength + sideBLength * sideBLength);
     }
 
     private float GetGuidedRotation()
     {
         var position = guideTopRight.position - guideBottomLeft.position;
         var widthVector = new Vector2(position.x, -position.z);
         return Vector2.SignedAngle(Vector2.right, widthVector);
     }
 }