At present, none. I don’t believe the protocol details have been published, so someone would have to reverse engineer how it works by monitoring the I2C communication between Tete and Tetrapad. If the message formats become documented I’m sure someone with the relevant devices will add support to crow, Teletype, or other modules.
The most comprehensive reference for what devices are supported by monomer modules is probably their source code, for instance crow’s i2c descriptor files or Teletype’s op code. There is also generated documentation for these but the code is a useful way to see what’s available at a glance.