I now know of three ways to transmit Remote ID information, for training and evaluation purposes only of course.
In their own words:-
SquidRID is an experimental tool to test and control most of aspects of the FAA RemtoeID protocol. It comes in two parts: Configurator and Firmware. Many options of the protocol are exposed and can be freely configured.
The configurator is accessible at https://squidrid.flyandi.net but requires Google Chrome.
SquidRID run’s on most ESP32 boards and requires the Arduino IDE to upload the firmware.
Find it on GitHub here https://github.com/flyandi/squidrid
I first saw this on Botgrinders channel last night and have several Bluetooth ESP32s lying around why not. It just proves how useless ASTM F3411-22a was.