RAK5146 Firmware / RPi Hat

Dear all,
I bought an RAK5146 USB with GPS / LBT - but did not yet find an official firmware.
Also, the miniPCI-Express USB interface does only expose the SX1303m but not the GPS and PPS signal - because there is none RPi Hat available yet.
I just wanted to ask when the official firmware will be available like on the RAK2287?

Thanks a lot!

So keep it up to date, here are my findings:

Bottom line: The RAK5146 seems to be not usable at the moment.