need a little help with my code camera rotation

so i'm working on the top down game for android but can't seem to get the camera to rotate on swipe from left to right can you guys help me with this because environment blocks the players video so i want them to be able to rotate the camera from right to left with swipe to be able to see in the direction they're heading i have tried so many different way to make this work but everything i've tried failed so can't you help me fix this

 using UnityEngine;
 
 [ExecuteInEditMode]
 public class FollowCamera : MonoBehaviour
 {
     private Transform cacheTransform;
     public Transform CacheTransform
     {
         get
         {
             if (cacheTransform == null)
                 cacheTransform = GetComponent<Transform>();
             return cacheTransform;
         }
     }
 
     // The target we are following
     public Transform target;
     public Vector3 targetOffset;
     [Header("Follow")]
     public float damping = 10.0f;
     public bool dontSmoothFollow;
     [Header("Look at")]
     public float lookAtDamping = 2.0f;
     public bool dontSmoothLookAt;
     [Header("Rotation")]
     public float xRotation;
     public float yRotation;
     [Tooltip("If this is TRUE, will update Y-rotation follow target")]
     public bool useTargetYRotation;
     [Header("Zoom")]
     public float zoomDistance = 10.0f;
     [Header("Zoom by ratio (Currently work well with landscape screen)")]
     public bool zoomByAspectRatio;
     public float zoomByAspectRatioWidth;
     public float zoomByAspectRatioHeight;
     public float zoomByAspectRatioMin;
 
     private void Update()
     {
         var targetPosition = target == null ? Vector3.zero : target.position;
         var targetYRotation = target == null ? 0 : target.eulerAngles.y;
         var wantedPosition = targetPosition + targetOffset;
         var wantedYRotation = useTargetYRotation ? targetYRotation : yRotation;
 
         // Convert the angle into a rotation
         var currentRotation = Quaternion.Euler(xRotation, wantedYRotation, 0);
 
         // Set the position of the camera on the x-z plane to:
         // distance meters behind the target
         wantedPosition -= currentRotation * Vector3.forward * zoomDistance;
 
         // Update position
         if (!dontSmoothFollow)
             CacheTransform.position = Vector3.Slerp(CacheTransform.position, wantedPosition, damping * Time.deltaTime);
         else
             CacheTransform.position = wantedPosition;
 
         // Always look at the target
         if (!dontSmoothLookAt)
         {
             Quaternion lookAtRotation = Quaternion.LookRotation(targetPosition + targetOffset - CacheTransform.position);
             CacheTransform.rotation = Quaternion.Slerp(CacheTransform.rotation, lookAtRotation, lookAtDamping * Time.deltaTime);
         }
         else
             CacheTransform.rotation = Quaternion.LookRotation(targetPosition + targetOffset - CacheTransform.position);
 
         if (zoomByAspectRatio)
         {
             var targetaspect = zoomByAspectRatioWidth / zoomByAspectRatioHeight;
             var windowaspect = (float)Screen.width / (float)Screen.height;
             var scaleheight = windowaspect / targetaspect;
             var diffScaleHeight = 1 - scaleheight;
             if (diffScaleHeight < zoomByAspectRatioMin)
                 diffScaleHeight = zoomByAspectRatioMin;
             zoomDistance = diffScaleHeight * 20f;
         }
     }
 
     private void LateUpdate()
     {
 #if UNITY_EDITOR
         // Update camera when it's updating edit mode (not play mode)
         if (!Application.isPlaying && Application.isEditor)
             Update();
 #endif
     }
 }