Unity generated mesh average normals on seperate vertices on same position/ smooth shade generated mesh

I have been following this tutorial from catlikecoding on a mesh generator and currently have this result.

I'm a beginner at all of this but i thought it would automatically smooth shade if i use RecalculateNormals() but i'm guessing it doesn't work well because it's all seperate vertices.

Would it make sense to create a seperate list of shared vertices and somehow find the normals per vertice cluster and average them on all? I can't find a good way to approach that problem, so any hint would help greatly!

Here is what i have so far on the mesh generation

 [NonSerialized] List<Vector3> vertices;
 [NonSerialized] List<int> triangles;
 [NonSerialized] List<Vector3> normals;
 
 void Awake () {
     GetComponent<MeshFilter>().mesh = hexMesh = new Mesh();
     hexMesh.name = "Hex Mesh";
 }
 
 public void Clear () {
     hexMesh.Clear();
     vertices = ListPool<Vector3>.Get();
     triangles = ListPool<int>.Get();
     normals = ListPool<Vector3>.Get();
 }
 
 public void Apply () {
     hexMesh.SetVertices(vertices);
     ListPool<Vector3>.Add(vertices);    
     hexMesh.SetTriangles(triangles, 0);
     hexMesh.SetNormals(normals);
     ListPool<int>.Add(triangles);
     ListPool<Vector3>.Add(normals);
     hexMesh.RecalculateNormals();
 }
 
 public void AddTriangle (Vector3 v1, Vector3 v2, Vector3 v3) {
     int vertexIndex = vertices.Count;
     vertices.Add(HexMetrics.Perturb(v1));
     vertices.Add(HexMetrics.Perturb(v2));
     vertices.Add(HexMetrics.Perturb(v3));
     triangles.Add(vertexIndex);
     triangles.Add(vertexIndex + 1);
     triangles.Add(vertexIndex + 2);
 }
 
 public void AddQuad (Vector3 v1, Vector3 v2, Vector3 v3, Vector3 v4) {
     int vertexIndex = vertices.Count;
     vertices.Add(HexMetrics.Perturb(v1));
     vertices.Add(HexMetrics.Perturb(v2));
     vertices.Add(HexMetrics.Perturb(v3));
     vertices.Add(HexMetrics.Perturb(v4));
     triangles.Add(vertexIndex);
     triangles.Add(vertexIndex + 2);
     triangles.Add(vertexIndex + 1);
     triangles.Add(vertexIndex + 1);
     triangles.Add(vertexIndex + 2);
     triangles.Add(vertexIndex + 3);
 }