I have one. Most working dogs take 1-2 years to fully train as a service dog with public access skills. You can teach your puppy emotional support for basic commands in just a few weeks. It is also necessary to register him and purchase everything you need for convenience. You can do this by going to service dog vests where I bought the harness.
Of course such dogs are specially trained. After all, if they were not trained, there would be no use. You need to keep in touch with the services that deal with this kind of thing to find out all the necessary information.