Add data to select of Contact Form 7 like Listo

cf7-custom-select.php

<?php
/**
 * Plugin Name:       CF7 Custom Select
 * Description:       Add data to select like Listo
 * Version:           1.0.0
 * Author:            Mário Valney
 * Author URI:        https://mariovalney.com
 * Text Domain:       cf7-custom-select
 */

/**
 * You should add a tag like Listo:
 * [select your-select-key data:your_filter_key]
 *
 * Support args:
 * [select your-select-key data:your_filter_key.argument]
 */
add_filter( 'wpcf7_form_tag_data_option', 'cf7_custom_select_wpcf7_form_tag_data_option', 99, 3 );
function cf7_custom_select_wpcf7_form_tag_data_option( $data, $options, $args ) {
    if ( empty( $options ) || empty( $options[0] ) ) {
        return $data;
    }

    $option = explode( '.', $options[0], 2 );
    $arg = ! empty( $option[1] ) ? $option[1] : '';

    return apply_filters( 'cf7_custom_select_' . $option[0], $data, $arg );
}

/**
 * You can add filters like this:
 * cf7_custom_select_{your_filter_key}
 */
add_filter( 'cf7_custom_select_users', 'cf7_custom_select_users', 10, 3 );
function cf7_custom_select_users( $data, $arg = '' ) {
    $args = array(
        'role'   => $arg,
        'fields' => array(
            'user_email',
        ),
    );

    $users = get_users( $args );
    $users = array_column( $users, 'user_email' );

    return array_values( array_filter( $users ) );
}