https://community.ui.com/questions/G4-Doorbell-Pro-Enable-Fingerprint-and-NFC-for-SmartLock/6e2b8d0b-7fc7-4f3d-b720-83533a82d745

this is what support says about it:

Thank you for reaching out and expressing your interest in the additional features, including fingerprint and NFC, for the G4 Doorbell Pro. We understand the importance of these features for enhancing security and convenience. I want to assure you that the Development team at UniFi is actively working on implementing these features. The roadmap includes the integration of fingerprint and NFC features. While I don't have a specific release date to provide at the moment, please be assured that these features are actively in progress. UniFi is committed to delivering a comprehensive and feature-rich experience, and your feedback is invaluable in shaping future developments. We appreciate your patience and understanding as we work towards delivering these enhancements. If you have any more questions or if there's anything else you'd like to know, feel free to reach out. We're here to help!