Example.cs

using Unity.Collections;
using UnityEngine;

[ExecuteAlways]
public class Example : MonoBehaviour
{
    [SerializeField] private LineRenderer      m_lineRenderer;
    [SerializeField] private PolygonCollider2D m_collider2D;

    private void Update()
    {
        if ( m_lineRenderer == null ) return;
        if ( m_collider2D == null ) return;

        var points         = m_collider2D.points;
        var transformCache = transform;
        var position       = transformCache.position;
        var lossyScale     = transformCache.lossyScale;
        var positionCount  = points.Length;
        var positions      = new NativeArray<Vector3>( positionCount, Allocator.Temp );

        try
        {
            for ( var i = 0; i < positionCount; i++ )
            {
                var point = points[ i ];

                positions[ i ] = new
                (
                    point.x * lossyScale.x + position.x,
                    point.y * lossyScale.y + position.y
                );
            }

            m_lineRenderer.positionCount = positionCount;
            m_lineRenderer.SetPositions( positions );
        }
        finally
        {
            positions.Dispose();
        }
    }
}