Proton Pass allows you to export and reimport passkeys. An industry-wide standard for exports is not yet finalized, but as soon as it is, we'll support that too

Proton Pass allows you to export and reimport passkeys. An industry-wide standard for exports is not yet finalized, but as soon as it is, we'll support that too. Regarding passkey implementation, it's up to individual websites whether they use passkey or passkey + 2FA, etc..