Yes, I wrote the current tor transport as a quick demo/testground for custom transports.
Arguably directly embedding the rust tor implementation would be more useful for the typical iroh user that wants an embeddable library. I just did not get to it yet.
you are using a Tor daemon in it. tor has a rust implementation and when used with rust has stream objects etc.
an example of how it's used can be found in https://gitlab.torproject.org/tpo/core/oniux