Smart lock suddenly lost the option for connected devices. I've been using my smart watch as Smart Lock device for the best part of a decade. As of yesterday I can't 🤷 :
How to use Android Smart Lock - Phandroid
Google smart lock is preventing me access to one of my apps. How do I remove it? - Android Community
Smart Lock will come back to Android next week, Samsung confirms - Sammy Fans
Trusted devices returns to Smart Lock on Samsung, Google smartphones - Sammy Fans