Migrate Mosquitto off of Home Assistant OS, onto separate VM?

You need to enable developer access to SSH in the home assistant OS. The reason you don't see it now is because you're inside the core container, not the actual OS. Within the OS all the docker commands are available. There are multiple ways to make this work, but the easiest is this πŸ†•[add-on] HassOS SSH port 22222 Configurator