Skinned Mesh Renderer Bones reset from UnityCodeMonkey (https://www.youtube.com/watch?v=nSmEirb8JGM)

TestSkinnedMeshRendererBones.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TestSkinnedMeshRendererBones : MonoBehaviour {

[SerializeField] private SkinnedMeshRenderer skinnedMeshRendererPrefab;
[SerializeField] private SkinnedMeshRenderer originalSkinnedMeshRenderer;
[SerializeField] private Transform rootBone;

  private void Start() {
    SkinnedMeshRenderer spawnedSkinnedMeshRenderer = Instantiate(skinnedMeshRendererPrefab, transform);
    spawnedSkinnedMeshRenderer.bones = originalSkinnedMeshRenderer.bones;
    spawnedSkinnedMeshRenderer.rootBone = rootBone;
    
    foreach (Transform bone in originalSkinnedMeshRenderer.bones) {
      Debug.Log(bone);
    }
  }

}