ConvertToPoints.cs

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

[ExecuteInEditMode]
public class ConvertToPoints : MonoBehaviour
{
    
    void Start()
    {
        var mf = GetComponent<MeshFilter>();
        var mesh = Application.isPlaying ? mf.mesh : mf.sharedMesh;
        
        mesh.SetIndices(Enumerable.Range(0, mesh.vertices.Length).ToArray(), MeshTopology.Points, 0);
        
        if (Application.isPlaying) gameObject.GetComponent<MeshFilter>().mesh = mesh;
        else gameObject.GetComponent<MeshFilter>().sharedMesh = mesh;
    }

}