the company INTRANAV release a starter Kit that is possible to utilize the UWB functionality of the iphone ... e.g. Geo-Fences and indoor tracking for industrial use-cases and smart home ... i chatted with a guy they said they support NXP and Decawave UWB Channel 5 and Channel 9
intranav.com/en/iot-rtls-suite/rtls-uwb-tracking-system/