Open-source host software and a Wireshark plugin (forthink-xyz/uwb-sniffer-wireshark) that monitor and decode CCC, FiRa and IEEE 802.15.4a/z UWB, including parameters for Apple Car-Key and AirTag/Nearby-Interaction (FiRa) traffic. Caveat: the software is open but it REQUIRES Forthink's COMMERCIAL UWB-Dongle-Sniffer hardware (an FT4222H-interfaced dongle), the radio itself is a closed, purchased product, not open hardware. Listed for completeness as the most capable off-the-shelf UWB capture path; it observes frames, it does not defeat STS-protected ranging integrity.
Lifecycle not assessed: nobody has checked yet whether this tool is still maintained, sold or working. Check the project's own page before relying on it.