Example.cs

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

[ExecuteAlways]
public class Example : MonoBehaviour
{
    [SerializeField] private SpriteRenderer m_spriteRenderer;
    [SerializeField] private LineRenderer[] m_lineRenderers;

    private void Update()
    {
        if ( m_spriteRenderer == null ) return;
        if ( m_lineRenderers == null || m_lineRenderers.Length <= 0 ) return;

        var sprite        = m_spriteRenderer.sprite;
        var positionCount = sprite.GetPhysicsShapeCount();
        var physicsShape  = new List<Vector2>();

        for ( var i = 0; i < m_lineRenderers.Length; i++ )
        {
            var enabled      = i < positionCount;
            var lineRenderer = m_lineRenderers[ i ];

            lineRenderer.enabled = enabled;

            if ( !enabled ) continue;

            physicsShape.Clear();
            sprite.GetPhysicsShape( i, physicsShape );

            lineRenderer.positionCount = physicsShape.Count;
            lineRenderer.SetPositions( physicsShape.Select( x => transform.TransformPoint( x ) ).ToArray() );
        }
    }
}