Open up port 6001 for laravel-websockets (php via cli service)

I'm trying to figure out how to run laravel-websockets with lando.
https://beyondco.de/docs/laravel-websockets/getting-started/introduction
laravel-websockets is a PHP CLI Ratchet application running on port 6001.

This is my lando file:

name: lintex
recipe: laravel
config:
  webroot: public
  php: '7.4'
  composer_version: '2.0.4'
  via: nginx
  database: mysql:8.0
  cache: redis
excludes:
  - vendor
  - node_modules
proxy:
  appserver_nginx:
    - lintex.local
    - "*.lintex.local"
  websockets:
    - lintex.local:6001
services:
  database:
    type: mysql:8.0
    portforward: 3306
    creds:
      user: lintex
      password: lintex
      database: lintex
  horizon:
    type: php:7.4
    via: cli
    command: php /app/artisan horizon
  websockets:
    type: php:7.4
    via: cli
    portforward: 6001
    ports:
      - '6001'
    command: php /app/artisan websockets:serve
bindAddress: "0.0.0.0"

It seems the port 6001 is not accessible from the host.
The websockets service also needs to be accessable from the other services.

Start by reproducing the supplied Lando configuration, especially the websockets PHP CLI service running php /app/artisan websockets:serve on port 6001. Check how port forwarding and service-to-service access work for CLI services; done means port 6001 is reachable from the host and from the other services.