Property Hive available-from custom field added as new dropdown in search

snippet.php

add_filter('propertyhive_search_form_fields_default', 'edit_default_property_search_form_fields', 99);
function edit_default_property_search_form_fields($fields)
{
    $fields['available_from'] = array(
        'type' => 'select',
        'label' => __('Available From', 'propertyhive'),
        'show_label' => true,
        'before' => '<div class="control control-available_from">',
        'options' => array(
            '' => 'No Preference',
            'available-now' => 'Available Now',
            'available-2025' => 'Available 2025',

        )
    );

    return $fields; // return the fields
}

add_filter('propertyhive_property_query_meta_query', 'filter_on_available_from', 10, 2);
function filter_on_available_from($meta_query, $ph_query)
{
    if (
        isset($_REQUEST['available_from']) && $_REQUEST['available_from'] != ''
    ) {
        $available_from = ph_clean($_REQUEST['available_from']);

        $meta_query[] = array(
            'key'     => '_available_from',
            'value'   => $available_from,
            'compare' => '=',
        );
    }

    return $meta_query;
}