Custom Pass injected by script

DrawMeshPass

using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

[ExecuteInEditMode]
public class CustomPass : MonoBehaviour
{
    public Mesh mesh;
    public Material material;
    DrawMeshPass m_DrawMeshPass;

    void OnEnable()
    {
        m_DrawMeshPass = new DrawMeshPass();
        m_DrawMeshPass.renderPassEvent = RenderPassEvent.AfterRendering;
        RenderPipelineManager.beginCameraRendering += DrawMesh;
    }

    void OnDisable()
    {
        RenderPipelineManager.beginCameraRendering -= DrawMesh;
    }

    void DrawMesh(ScriptableRenderContext context, Camera cam)
    {
        if (mesh == null || material == null) return;

        var renderer = cam.GetRenderer();
        m_DrawMeshPass.mesh = mesh;
        m_DrawMeshPass.material = material;
        m_DrawMeshPass.matrix = Matrix4x4.TRS(transform.position, transform.rotation, transform.lossyScale);
        renderer.EnqueuePass(m_DrawMeshPass);
    }
}

class DrawMeshPass : ScriptableRenderPass
{
    public Matrix4x4 matrix { get; set; }
    public Mesh mesh { get; set; }
    public Material material { get; set; }

    public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
    {
        CommandBuffer cb = CommandBufferPool.Get("DrawMesh");
        cb.DrawMesh(mesh, matrix, material);
        context.ExecuteCommandBuffer(cb);
        context.Submit();
        CommandBufferPool.Release(cb);
    }
}