Trying to learn RenderFeature, can't get basic blit to work using RTHandle

Unity Engine
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1

I’m trying to do a basic blit using a material in Scriptable Render Feature,
Could someone please help me understand why it’s not working?

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

public class PleaseBlit : ScriptableRendererFeature
{
    class CustomRenderPass : ScriptableRenderPass
    {
        private Material material;
        private RTHandle tempTexture;

        public CustomRenderPass(Material material) : base()
        {
            this.material = material;
        }

        public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
        {
            // RTHandle allocation
            // v1
            var descriptor = renderingData.cameraData.cameraTargetDescriptor;
            tempTexture = RTHandles.Alloc(descriptor, FilterMode.Bilinear, TextureWrapMode.Clamp, name: "_TexName");
            //RenderingUtils.ReAllocateIfNeeded(ref tempTexture, descriptor, FilterMode.Bilinear, TextureWrapMode.Clamp, name: "_TexName");

            //RenderTextureDescriptor cameraTextureDesc = renderingData.cameraData.cameraTargetDescriptor;
            //cameraTextureDesc.depthBufferBits = 0;
            //cmd.GetTemporaryRT(tempTexture.id, cameraTextureDesc, FilterMode.Bilinear);

            var source = renderingData.cameraData.renderer.cameraColorTargetHandle;
            var cmd = CommandBufferPool.Get();

            // BLit
            // v1
            Blit(cmd, source, tempTexture, material, 0);
            Blit(cmd, tempTexture, source);

            //Blit(cmd, source, source);
            //Blitter.BlitTexture(cmd, source, Vector2.one, material, 0);

            // v2
            //Blitter.BlitCameraTexture(cmd, source, source);

            context.ExecuteCommandBuffer(cmd);
            cmd.Clear();
            CommandBufferPool.Release(cmd);
        }

        public override void OnCameraCleanup(CommandBuffer cmd)
        {
            //if (tempTexture != null)
            //{
            //    RTHandles.Release(tempTexture);
            //    //tempTexture?.Release();
            //    tempTexture = null;
            //}

            RTHandles.Release(tempTexture);
        }
    }

    public Material material;
    private CustomRenderPass pass;

    public override void Create()
    {
        pass = new CustomRenderPass(material);
        pass.renderPassEvent = RenderPassEvent.BeforeRenderingPostProcessing;
    }

    public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
    {
        if (renderingData.cameraData.cameraType == CameraType.Game)
        {
            renderer.EnqueuePass(pass);
        }
    }
}