Laravel Websocket works in Firefox, not in Edge

Question

I have installed a laravel application on a public webserver.

Apache has been configured with a Let's Encrypt certificate with certbot and the website is available in https.

Using the mydomain.it/laravel-websockets link I checked that everything is working. Using firefox the socket connects, but using Edge it does not

I need to use websockets so I configured as follows:

bootstrap.js

import Echo from 'laravel-echo';

window.Pusher = require('pusher-js');

window.Echo = new Echo({
     wsHost: window.location.hostname,
     wsPort: 6000,
     wssPort: 6001,
     broadcaster: 'pusher',
     key: process.env.MIX_PUSHER_APP_KEY,
     cluster: process.env.MIX_PUSHER_APP_CLUSTER,
     forceTLS: true,
     encrypted: true,
     enabledTransports: ['wss']
 });

broadcasting.php

'connections' => [

        'pusher' => [
            'driver' => 'pusher',
            'key' => env('PUSHER_APP_KEY'),
            'secret' => env('PUSHER_APP_SECRET'),
            'app_id' => env('PUSHER_APP_ID'),
            'options' => [
                'cluster' => env('PUSHER_APP_CLUSTER'),
                'encrypted' => true,
                'host' => 'mydomain.it',
                'port' => 6001,
                'scheme' => 'https',
                'curl_options' => [
                    CURLOPT_SSL_VERIFYHOST => 0,
                    CURLOPT_SSL_VERIFYPEER => 0,
                ]
            ],
        ],

websockets.php

'apps' => [
        [
            'id' => env('PUSHER_APP_ID'),
            'name' => env('APP_NAME'),
            'key' => env('PUSHER_APP_KEY'),
            'secret' => env('PUSHER_APP_SECRET'),
            'path' => env('PUSHER_APP_PATH'),
            'capacity' => null,
            'enable_client_messages' => false,
            'enable_statistics' => true,
            'encrypted' => true,
            'verify_peer' => false,
        ],
    ],

.env

PUSHER_APP_ID=123456
PUSHER_APP_KEY=myappkey
PUSHER_APP_SECRET=mysecret
PUSHER_APP_CLUSTER=mt1

LARAVEL_WEBSOCKETS_SSL_LOCAL_CERT=/etc/letsencrypt/live/mydomain.it/fullchain.pem
LARAVEL_WEBSOCKETS_SSL_LOCAL_PK=/etc/letsencrypt/live/mydomain.it/privkey.pem