Update

Assets/Scripts/Camera Controller/CameraCollisionHandler.cs

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+using UnityEngine;
+
+namespace OnlyScove.Scripts
+{
+    [System.Serializable]
+    public class CameraCollisionHandler
+    {
+        [Header("Collision Settings")]
+        [SerializeField] private LayerMask collisionLayers;
+        [SerializeField] private float cameraRadius = 0.2f;
+        public float CheckCollision(Vector3 focusPosition, Quaternion currentRotation, float targetDistance, float minimumDistanceAllowed)
+        {
+            RaycastHit hit;
+            Vector3 rayStart = focusPosition;
+            Vector3 rayDirection = currentRotation * Vector3.back;
+
+            if (Physics.SphereCast(rayStart, cameraRadius, rayDirection, out hit, targetDistance, collisionLayers))
+            {
+                return Mathf.Max(minimumDistanceAllowed, hit.distance - 0.1f);
+            }
+            return targetDistance;
+        }
+    }
+}