Looks like they are just rolling out support for Android 14 and up.

https://blog.1password.com/save-use-passkeys-android/

Proton is also the ONLY passkey provider that I’ve seen allowing you to store, share, and export passkeys just like you can with passwords!

1Password has had this for several months.

As others have mentioned, Bitwarden also has this. This really feels like an ad.