How do i get world position of collider if it inside multiple scaled gameobjects?

I want to get matrix wich will put vertices on sphere collider.

I wrote this:

     [ExecuteInEditMode()]
     [RequireComponent(typeof(SphereCollider))]
     public class SphereColliderTest : MonoBehaviour {
         Vector3[] _sphereVerts;
         int[] _sphereTris;
     
         SphereCollider col;
     
         void OnEnable() {
             col = GetComponent<SphereCollider>();
     
             GameObject primitive = GameObject.CreatePrimitive(PrimitiveType.Sphere);
             Mesh result = primitive.GetComponent<MeshFilter>().sharedMesh;
             _sphereVerts = result.vertices;
             _sphereTris = result.triangles;
             DestroyImmediate(primitive);
         }
     
         void Update () {
             Debuger.ClearGeneric();
             Vector3[] v = new Vector3[_sphereVerts.Length];
     
             Vector3 tScale = transform.lossyScale;        
             float r = Mathf.Max(Mathf.Abs(tScale.x), Mathf.Abs(tScale.y), Mathf.Abs(tScale.z)) * (col.radius / 0.5f);
             Vector3 cr = new Vector3(r, r, r);
             Matrix4x4 mr = Matrix4x4.TRS(transform.position, transform.rotation, Vector3.one) * Matrix4x4.TRS(Vector3.Scale(col.center, tScale), Quaternion.identity, cr);
             
             for (int i = 0; i < _sphereVerts.Length; i++) {
                 v[i] = mr.MultiplyPoint3x4(_sphereVerts[i]);
             }
     
             Debuger.AddWireMesh(v, _sphereTris, Color.blue);      
         }
     }

and, well, it actualy works just fine. but when i put sphere inside another scaled object i have no clue what unity does. how do i put vertices where i want in that case?