https://www.bilibili.com/video/BV1ff4y197Tx/

public class FollowTarget : MonoBehaviour
{
    public Transform player;
    private Vector3 offset;
    public float smooth = 3;
    // Start is called before the first frame update
    void Start()
    {
        offset = transform.position - player.position;
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        Vector3 targetPosition = player.position + player.TransformDirection(offset);
        transform.position = Vector3.Lerp(transform.position, targetPosition, Time.fixedDeltaTime * smooth);
        transform.LookAt(player);
    }
}

standard assets
（提取码：60i9）