I am experiencing some mistakes with my symfony crud system. Is there anyone that can help me out with it.

Read statement this is how I am getting the data from my database:

   #[Route('/admin', name: 'app_admin')]
    public function index(EntityManagerInterface $em): Response
    {
        $product = $em->getRepository(Product::class)->findAll();
        return $this->render('admin/index.html.twig', [
            'product' => $product,
        ])

This is the delete statement that I am using, but its not working how it should:

    #[Route('/delete/{id}', name: 'delete')]
    public function delete(EntityManagerInterface $em, int $id): Response
    {
        $product = $em->getRepository(Product::class)->find($id);
        $em->remove($product);
        $em->flush();
        $name = $product->getName();
        $this->addFlash('succes', "$name is verwijderd");
        return $this->redirectToRoute('app_admin');
    }

This is the update statement that I am using, but it is also not really working how it is supposed to be working:

   #[Route('/update/{id}', name: 'update')]
    public function update(EntityManagerInterface $em, int $id, Request $request): Response
    {

        $product = $em->getRepository(Product::class)->find($id);

        $form = $this->createForm(UpdateType::class, $product);

        $form->handleRequest($request);
        if($form->isSubmitted() && $form->isValid())
        {
            $product = $form->getData();
            $em->persist($product);
            $em->flush();
            $name = $product->getName();
            $this->addFlash('succes', "Product $name is aangepast");
            return $this->redirectToRoute('app_admin');
        }

        return $this->render('admin/update.html.twig', [
            'form' => $form,
        ]);
    }

This is the create statement this is working but not correctly:

    #[Route('/insert', name: 'insert')]
    public function insert(EntityManagerInterface $em, Request $request): Response
    {

        $product = $em->getRepository(Product::class)->find($id);

        $form = $this->createForm(UpdateType::class, $product);

        $form->handleRequest($request);
        if($form->isSubmitted() && $form->isValid())
        {
            $product = $form->getData();
            $em->persist($product);
            $em->flush();
            $name = $product->getName();
            $this->addFlash('succes', "Product $name is aangepast");
            return $this->redirectToRoute('app_admin');
        }

        return $this->render('admin/update.html.twig', [
            'form' => $form,
        ]);
    }

I tried checking the symfony website but it didn’t help. Is there anyone who can help me out?