How to set default selected value in UX Symfony dropdown

Question

I managed to implement dropdown with UX Symphony using custom Autocompleter following the documentation.

namespace App\Autocompleter;

class FooAutocompleter implements EntityAutocompleterInterface { ... }

I add this view :

<select name="foo"
     {{ stimulus_controller('symfony/ux-autocomplete/autocomplete', {
        url: path('ux_entity_autocomplete', { alias: 'foo' })
     }) }}></select>

I would like to know how to set default selected value using this tool ( UX Symfony / Tom Select / Stimulus ) ?