This repository contains a Zephyr driver for the Solder Party BBQ10KBD, and a sample application using the driver.
The Zephyr driver should work with the BBQ10Keyboard PMOD and FeatherWing versions.
Check the Solder Party's official repository for the BBQ10KBD software for more information about the protocol, registers and a lot more.
Also don't forget to check the Solder Party Tindie shop for other nice stuff.