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...
I’m definitely holding off on passkeys until that project is finished. I also don’t want vendor lock in and while that seems like the solution, it seems like they just started working on it.