How to handle multiple entities on the same form in symfony?

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// src/Form/YourFormType.php

namespace AppForm;

use SymfonyComponentFormAbstractType;
use SymfonyComponentFormExtensionCoreTypeTextType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolver;

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('field1', TextType::class)
            ->add('field2', TextType::class)
            // Add other fields for your entities
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            // Set the data_class option to null so that the form does not bind to a specific entity
            'data_class' => null,
        ]);
    }
}

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// src/Controller/YourController.php

namespace AppController;

use AppFormYourFormType;
use SymfonyBundleFrameworkBundleControllerAbstractController;
use SymfonyComponentHttpFoundationRequest;
use SymfonyComponentRoutingAnnotationRoute;

class YourController extends AbstractController
{
    /**
     * @Route("/your-route", name="your_route")
     */
    public function yourAction(Request $request)
    {
        // Create instances of the entities you want to handle in the form
        $entity1 = new Entity1();
        $entity2 = new Entity2();
        // ...
        
        // Create a form using the form type and the entities as initial data
        $form = $this->createForm(YourFormType::class, [
            'field1' => $entity1,
            'field2' => $entity2,
            // ...
        ]);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            // Handle form submission and save data to entities
            
            // Retrieve updated entities from the form
            $entity1 = $form->get('field1')->getData();
            $entity2 = $form->get('field2')->getData();
            // ...

            // Save entities to the database
            $entityManager = $this->getDoctrine()->getManager();
            $entityManager->persist($entity1);
            $entityManager->persist($entity2);
            // ...
            $entityManager->flush();
            
            // Redirect or render a response
        }

        return $this->render('your_template.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

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{# templates/your_template.html.twig #}

<form method="POST" action="{{ path('your_route') }}">
    {{ form_widget(form.field1) }}
    {{ form_widget(form.field2) }}
    {# Add other fields for your entities #}
    <button type="submit">Submit</button>
</form>