You can export them- just did so by touching the context menu on the mobile app then “copy item JSON.” This includes the private key for the passkey. Here’s one I just exported: https://gist.github.com/jacksonwelsh/f5ad519770b1adde40a6ee9...

Whether or not you can import them into something else though…

The whole original point of what underpins FIDO2 was device locked, unphishable credentials. Wanting to export and move passkeys between devices is kind of counter to that. And I would argue vendors completing the attestation process are much more trustworthy than storing your own keys god knows where.

Oh, ok. If that's the same thing as passkeys, then I finally figured out that I'm not interested. To me it looks like another vector for platform lock-in, or getting mysteriously locked out of my accounts with no recourse. I'll wait for FIDO3.

Yep. I absolutely refuse to support anything that wants to dictate what I do with my identity.

Such things do have purposes, in high-stakes environments. They prevent accidents. The vast majority of uses on the public web are not even remotely in that realm. It'd be better off being a separate spec that only a handful of internal-only systems use, ideally requiring MDM to set up conveniently (to strongly discourage normal and even high-stakes-normal website usage).

My banking website has absolutely no business knowing and being able to approve or deny what brand my authenticator is.