Input.deltaTime always returns 0 in Xcode, working in Unity Remote app

Hey,

I am reasonably new to Unity and a Hobbyist programmer at best. I am in the middle of creating my 2nd mobile game.

I am at a frustrating point in that my game works within Unity and on the Unity Remote app in iOS, however as soon as I compile it in Xcode it refuses to work in the same way.

The point it appears to be sticking at is because I am waiting for a user to have held down a tap by updating a variable and adding Input.deltaTime. However having output this deltaTime information to a debug log it appears that deltaTime is showing up as always 0 so the function never works. Please see my code below.

Thanks in advance.

 using UnityEngine;
 
 public class TouchController : MonoBehaviour
 {
     //variables
     enum State
     {
         startMode,
         scopeMode,
         aimMode
     }
 
     State currentState;
    
     public CameraController2 cameraController2;
     public GameObject arrowObject;
 
     public ArrowPutterPivotController arrowPutterPivotController;
 
     public BallController ballController;
     public PutterController putterController;
 
     private float touchStationaryTime;
     private Vector2 scopeStartVector;
 
 
     //functions
     private void Start()
     {
 
         currentState = State.startMode;
  
         arrowPutterPivotController.hideArrow();
     }
 
     void Update()
     {
         
         //check for input
         if (Input.touchCount > 0)
         {
             
            
             //get first touch details
             Touch touch = Input.GetTouch(0);
             TouchPhase phase = touch.phase;
             Debug.Log("TouchPhase: " + phase);
 
 
             //check if touch has just begun
             if (phase == TouchPhase.Began)
             {
                
                 //reset state to normal scoping
                 currentState = State.startMode;
                 touchStationaryTime = 0f;
                 scopeStartVector = Vector2.zero;
          
                 arrowPutterPivotController.hideArrow();
                 
             }
 
             //check if touch has has stayed still
             if (touch.phase == TouchPhase.Stationary && currentState == State.startMode)
             {
 
                 
                 //Increase touchstationarytime by time since last touch press
                 Debug.Log("touch.deltaTime: " + touch.deltaTime);
                 touchStationaryTime += touch.deltaTime;
                 Debug.Log("touchStationaryTime: " + touchStationaryTime);
                
 
                //Check if touch press is over 1 second
                 if (touchStationaryTime > 0.5f && ballController.stationary == true)
                 {
                     Debug.Log("if (touchStationaryTime > 0.5f && ballController.stationary == true)");
                     currentState = State.aimMode;
                     arrowObject.SetActive(true);
                     
                     arrowPutterPivotController.showArrow();
                     scopeStartVector = touch.position;
                 }
                 //check time of being in stationary status
             } else if (touch.phase == TouchPhase.Moved && currentState == State.startMode)
             {
              
                 currentState = State.scopeMode;
             }
 
 
         if ((touch.phase == TouchPhase.Moved || touch.phase == TouchPhase.Stationary) && currentState == State.aimMode)
             {
               
                 Vector2 diffVector;
                 diffVector = scopeStartVector - touch.position;
 
                 arrowPutterPivotController.setRotation(diffVector);
                 arrowPutterPivotController.resizeArrow(diffVector);
             }
 
             if (touch.phase == TouchPhase.Ended && currentState == State.aimMode)
             {
                 Vector2 diffVector;
                 diffVector = scopeStartVector - touch.position;
 
                 putterController.hitBall(diffVector);
               
                 arrowPutterPivotController.hideArrow();
                 scopeStartVector = Vector2.zero;
                 currentState = State.startMode;
             }
 
             if (touch.phase == TouchPhase.Moved && currentState == State.scopeMode)
             {
                 
                 cameraController2.Spin(touch.deltaPosition);
             }
    
         }
     }
 
 }