Symfony 5 - Override Form Type Options

The problem:

Hello, i am having a trouble with passing some options to the form fields in Symfony 5 Form Builder.

In the controller the form is being created:

$form = $this->createForm(FooFormType::class, $foo);

In the FooFormType.php my buildForm() method looks like this:

$builder
    ->add('collection', FooAutocompleteField::class, [ 
        'searchable_fields' => ['name'],
    ])
;

in the FooAutocompleteField.php i have only getParent() that returns the Symfony UX ParentEntityAutocompleteType::class and a configureOptions() which looks like this:

public function configureOptions(OptionsResolver $resolver): void
{
    $resolver->setDefaults([
       'class' => Foo::class,
       'searchable_fields' => ['override_me'],
    ]);
}

I need the searchable_fields to be replace within the FooFormType.php, ideally by passing an option in controller like this:

$form = $this->createForm(FooFormType::class, $foo,[
    'searchable_fields' => ['name'],
]);

What i've Tried:

1. Passing an option into builder like in example above
2. Adding $resolver->setDefined('searchable_fields'); after ConfigureOptions of FooAutocompleteField.php
3. I made a buildForm() method inside FooAutocompleteField.php and the $options does indeed change, but the defaults in configureOptions() are not overriden.

Update 22.02.2023:

It seems that when i do this (add an attr option):

$builder
    ->add('collection', FooAutocompleteField::class, [ 
        'searchable_fields' => ['name'],
        'attr' = [
           'class' => 'bg-primary',
           'placeholder' => 'THIS IS OVERRIDING',
        ]
    ])
;

The options are in fact overriding and getting passed to FooAutocompleteField!

But why not the 'searchable_fields'?

It seems like the initial form select options are overwritten, but the Ajax calls themselve use the Default configuration. Im stuck...

This is a known issue of symfony/ux: (Currently not really fixable.)

Here is the issue on github: https://github.com/symfony/ux/issues/420

You really cannot pass/override ANY options when you use an Ajax auto-complete field. This is because, on the Ajax call, we would have no way to re-create your AnyForm form (nor are we even aware of it). We simply re-create the FoodAutocompleteField and then use its query_builder.

Source : Ryan Weaver on issue