I'm looking for a tutorial or documentation on HMMatterRequestHandler. I'm aware of the brief mentions in wwdc21-10298 but it's not sufficient. Is there any tutorial/ more extensive documentation?

I'm trying to commission a matter device via HMAccessorySetupRequest.performMatterEcosystemAccessorySetup. After scanning the QR code via the system provided UI the app shows a system popup: Additional Setup Required This accessory required additional setup. Refer to the manufacturer's guide for more information Unfortunately there's no further information. Did anybody succeed in using this API and could assist?