Question Bad rotation in animation(AR application)

Hi
I have a problem with the animation not working properly as I would think. Although the animation is performed, the rotations of the object are very small.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.XR.ARFoundation;
5.  
6. public class MovingScript : MonoBehaviour
7. {
8.     [SerializeField]
9.     ARRaycastManager m_RaycastManager;
10.     [SerializeField]
11.     GameObject spawnedPrefab;
12.     List<ARRaycastHit> m_Hits = new List<ARRaycastHit>();
13.     Vector3 previousPosition;
14.     Vector3 finalPosition;
15.     Vector3 previousRotation;
16.     Vector3 finalRotation;
17.     float Angle;
18.     float ratio;
19.     float duration;
20.     float multiplier;
21.  
22.     void Start()
23.     {
24.         previousPosition = spawnedPrefab.transform.position;
25.         previousRotation = spawnedPrefab.transform.rotation.eulerAngles;
26.         duration = 0.9f;    //animation duration control
27.         multiplier = 1 / duration;
28.     }
29.  
30.     // Update is called once per frame
31.     void Update()
32.     {
33.         if (Input.touchCount > 0 && spawnedPrefab.transform.position == finalPosition)
34.         {
35.             Touch touch = Input.GetTouch(0);
36.  
37.             if (touch.phase == TouchPhase.Began)
38.             {
39.                 m_RaycastManager.Raycast(touch.position, m_Hits);
40.  
41.                 if (m_Hits[0].trackable is ARPlane plane)
42.                 {
43.                     previousPosition = finalPosition;
44.                     previousRotation = finalRotation;
45.                     ratio = 0;
46.                    
47.                     finalPosition = m_Hits[0].pose.position;
48.                     Angle = Vector3.SignedAngle(previousPosition, finalPosition, Vector3.up);
49.                     finalRotation = new Vector3(0, Angle + previousRotation.y, 0);
50.                 }
51.             }
52.         }
53.  
54.         if (spawnedPrefab.transform.rotation != finalRotation)
55.         {
56.             ratio += Time.deltaTime * multiplier;
57.             spawnedPrefab.transform.rotation = Quaternion.Euler(Vector3.Lerp(previousRotation, finalRotation, ratio));
58.         }
59.     }
60. }
61.