Adjust OneSignal PHP function to open URLs in App

Hello, I have a news website based on Wordpress, and I created a Webview App, for android and Apple using those kits ([login to view URL]). When I send push notification using Wordpress OneSignal plugin ([login to view URL]), and a user open the notification, the URL open in browser instead of App. After reading the documentation of OneSignal ([login to view URL]), in the section : Sending Notifications To Both Web Browsers And Mobile Devices The documentation propose to, Create a PHP file and upload it to directory contect/mu-plugins. I did this, now when the user click on the mobile notification, the App open, but displaying the home page instead of the URL. This is the PHP file content : <?php add_filter('onesignal_send_notification', 'onesignal_send_notification_filter', 10, 4); function onesignal_send_notification_filter($fields, $new_status, $old_status, $post) { /* Goal: We don't want to modify the original $fields array, because we want the original web push notification to go out unmodified. However, we want to send an additional notification to Android and iOS devices with an additionalData property. * */ $fields_dup = $fields; $fields_dup['isAndroid'] = true; $fields_dup['isIos'] = true; $fields_dup['isAnyWeb'] = true; $fields_dup['isWP'] = false; $fields_dup['isAdm'] = false; $fields_dup['isChrome'] = false; // $fields_dup['android_channel_id'] = "<CHANNEL ID UUID HERE>"; $fields_dup['data'] = array("myappurl" => $fields['url']); /* Important to set web_url to support opening through both mobile and browser*/ $fields_dup['web_url'] = $fields_dup['url']; /* Important to unset the URL to prevent opening the browser when the notification is clicked for mobile app users */ unset($fields_dup['url']); $onesignal_post_url = "[login to view URL]"; /* Hopefully OneSignal::get_onesignal_settings(); can be called outside of the plugin */ $onesignal_wp_settings = OneSignal::get_onesignal_settings(); $onesignal_auth_key = $onesignal_wp_settings['app_rest_api_key']; $request = array("headers" => array("content-type" => "application/json;charset=utf-8", "Authorization" => "Basic " . $onesignal_auth_key), "body" => json_encode($fields_dup), "timeout" => 60); $response = wp_remote_post($onesignal_post_url, $request); if (is_wp_error($response) || !is_array($response) || !isset($response['body'])) { $status = $response->get_error_code(); $error_message = $response->get_error_message(); error_log("There was a " . $status . " error returned from OneSignal when sending to mobile users: " . $error_message); return; } return $fields; } ?>