We had originally planned to go all-in on passkeys for ONCE/Campfire, and we built the early authentication system entirely around that. It was not a simple setup! Handling passkeys properly is surprisingly complicated on the backend, but we got it done. Unfortunately, the user experience kinda sucked, so we ended up ripping it all out...
One of many reasons I hate android. In my experience the integration with technology: late and poorly polished, early and kneecapped, initially available then removed, or non-existent.
I think its partly the fragmentation in the Android community and mostly Google’s influence.