DoTweenLerpExample.cs

using DG.Tweening;
using UnityEngine;

public class DoTweenLerpExample : MonoBehaviour
{
    [SerializeField] private Vector3 pointA = new Vector3(-2, 0, 0);
    [SerializeField] private Vector3 pointB = new Vector3(2, 0, 0);
    [SerializeField] private float speed = 1;

    private void Start()
    {
        transform.position = pointA;
        Tweener tweener = transform.DOMove(pointB, speed);
        tweener.SetEase(Ease.InOutQuad);
        tweener.SetLoops(int.MaxValue, LoopType.Yoyo);
    }
}