Not 100% sure about Thread as I'm more used to Zigbee, but afaik the Thread router acts as either a proxy between your regular network and the Thread devices (you can wrap IPv6 packets so they can be exposed over regular ethernet) or the router is the smart hub itself and the nodes are not really accessible from the Wifi network.
How it works in Home Assistant afaik is that the border router is a piece of software running in docker that has access to the radio, and then HA talks to the thread devices via the virtual network interface of Docker.
How it works in Home Assistant afaik is that the border router is a piece of software running in docker that has access to the radio, and then HA talks to the thread devices via the virtual network interface of Docker.