How do you create a Custom Wall Geometry via Procedural Mesh

Development Programming & Scripting
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Here is my code, any help would be appreciated.
// Fill out your copyright notice in the Description page of Project Settings.

include “HorizontalWall.h”

// Sets default values
AHorizontalWall::AHorizontalWall()
{
// Set this actor to call Tick() every frame. You can turn this off to improve performance if you don’t need it.
PrimaryActorTick.bCanEverTick = true;

HorizontalWall = CreateDefaultSubobject<UProceduralMeshComponent>("HorizontalWall");
RootComponent = HorizontalWall;

}
void AHorizontalWall::CreateMesh()
{
// Define the size of your horizontal plane
float PlaneSize = 100.0f;

// Define the number of subdivisions for the plane
int32 NumSubdivisions = 10;

// Calculate the size of each subdivision
float SubdivisionSize = PlaneSize / NumSubdivisions;

// Initialize the vertices and UVs arrays
for (int32 Y = 0; Y <= NumSubdivisions; Y++)
{
    for (int32 X = 0; X <= NumSubdivisions; X++)
    {
        FVector Vertex = FVector(X * SubdivisionSize - PlaneSize / 2, Y * SubdivisionSize - PlaneSize / 2, 0.0f);
        Vertices.Add(Vertex);

        FVector2D UV = FVector2D(static_cast<float>(X) / NumSubdivisions, static_cast<float>(Y) / NumSubdivisions);
        UVs.Add(UV);
    }
}

// Create triangles to form the mesh
for (int32 Y = 0; Y < NumSubdivisions; Y++)
{
    for (int32 X = 0; X < NumSubdivisions; X++)
    {
        int32 VertexIndex = X + Y * (NumSubdivisions + 1);

        // Triangle 1
        Triangles.Add(VertexIndex);
        Triangles.Add(VertexIndex + 1);
        Triangles.Add(VertexIndex + NumSubdivisions + 1);

        // Triangle 2
        Triangles.Add(VertexIndex + NumSubdivisions + 1);
        Triangles.Add(VertexIndex + 1);
        Triangles.Add(VertexIndex + NumSubdivisions + 2);
    }
}

// Create the mesh section
HorizontalWall->CreateMeshSection(0, Vertices, Triangles, TArray<FVector>(), UVs, TArray<FColor>(), TArray<FProcMeshTangent>(), true);

if (Material)
{
    HorizontalWall->SetMaterial(0, Material);
}

}

// Called when the game starts or when spawned
void AHorizontalWall::BeginPlay()
{
Super::BeginPlay();

CreateMesh();

}
void AHorizontalWall:: Tick(float DeltaTime)
{
Super::Tick(DeltaTime);
}